Re-order Helix keymaps and add alt-o/i/p/n (#40527)

Release Notes:

- helix: Re-ordered `helix_normal || helix_select` keybindings to follow the
same order as the keymap on the helix-editor
[documentation](https://docs.helix-editor.com/keymap.html).
- helix: Added `alt-o` & `alt-i` to Select larger and smaller syntax node
respectively
- helix: Added `alt-p` & `alt-n` to Select Next Syntax Node and Previous Syntax
Node respectively



--- 

The new main helix normal & select context looks like follows

```jsonc
{
    "context": "(vim_mode == helix_normal || vim_mode == helix_select) && !menu",
    "bindings": {
      // Movement
      "h": "vim::WrappingLeft",
      "left": "vim::WrappingLeft",
      "l": "vim::WrappingRight",
      "right": "vim::WrappingRight",
      "t": ["vim::PushFindForward", { "before": true, "multiline": true }],
      "f": ["vim::PushFindForward", { "before": false, "multiline": true }],
      "shift-t": ["vim::PushFindBackward", { "after": true, "multiline": true }],
      "shift-f": ["vim::PushFindBackward", { "after": false, "multiline": true }],
      "alt-.": "vim::RepeatFind",
      
      // Changes
      "shift-r": "editor::Paste",
      "`": "vim::ConvertToLowerCase",
      "alt-`": "vim::ConvertToUpperCase",
      "insert": "vim::InsertBefore",
      "shift-u": "editor::Redo",
      "ctrl-r": "vim::Redo",
      "y": "vim::HelixYank",
      "p": "vim::HelixPaste",
      "shift-p": ["vim::HelixPaste", { "before": true }],            
      ">": "vim::Indent",
      "<": "vim::Outdent",
      "=": "vim::AutoIndent",
      "d": "vim::HelixDelete",
      "c": "vim::HelixSubstitute",
      "alt-c": "vim::HelixSubstituteNoYank",
      
      // Selection manipulation
      "s": "vim::HelixSelectRegex",
      "alt-s": ["editor::SplitSelectionIntoLines", { "keep_selections": true }],
      ";": "vim::HelixCollapseSelection",
      "alt-;": "vim::OtherEnd",
      ",": "vim::HelixKeepNewestSelection",
      "shift-c": "vim::HelixDuplicateBelow",
      "alt-shift-c": "vim::HelixDuplicateAbove",
      "%": "editor::SelectAll",
      "x": "vim::HelixSelectLine",
      "shift-x": "editor::SelectLine",
      "ctrl-c": "editor::ToggleComments",
      "alt-o": "editor::SelectLargerSyntaxNode",
      "alt-i": "editor::SelectSmallerSyntaxNode",
      "alt-p": "editor::SelectPreviousSyntaxNode",
      "alt-n": "editor::SelectNextSyntaxNode",

      // Goto mode
      "g e": "vim::EndOfDocument",
      "g h": "vim::StartOfLine",
      "g l": "vim::EndOfLine",
      "g s": "vim::FirstNonWhitespace", // "g s" default behavior is "space s"
      "g t": "vim::WindowTop",
      "g c": "vim::WindowMiddle",
      "g b": "vim::WindowBottom",
      "g r": "editor::FindAllReferences", // zed specific
      "g n": "pane::ActivateNextItem",
      "shift-l": "pane::ActivateNextItem",      
      "g p": "pane::ActivatePreviousItem",
      "shift-h": "pane::ActivatePreviousItem",
      "g .": "vim::HelixGotoLastModification", // go to last modification
      
      // Window mode
      "space w h": "workspace::ActivatePaneLeft",
      "space w l": "workspace::ActivatePaneRight",
      "space w k": "workspace::ActivatePaneUp",
      "space w j": "workspace::ActivatePaneDown",
      "space w q": "pane::CloseActiveItem",
      "space w s": "pane::SplitRight",
      "space w r": "pane::SplitRight",
      "space w v": "pane::SplitDown",
      "space w d": "pane::SplitDown",

      // Space mode
      "space f": "file_finder::Toggle",
      "space k": "editor::Hover",
      "space s": "outline::Toggle",
      "space shift-s": "project_symbols::Toggle",
      "space d": "editor::GoToDiagnostic",
      "space r": "editor::Rename",
      "space a": "editor::ToggleCodeActions",
      "space h": "editor::SelectAllMatches",
      "space c": "editor::ToggleComments",
      "space p": "editor::Paste",
      "space y": "editor::Copy",

      // Other
      ":": "command_palette::Toggle",
      "m": "vim::PushHelixMatch",
      "]": ["vim::PushHelixNext", { "around": true }],
      "[": ["vim::PushHelixPrevious", { "around": true }],
      "g q": "vim::PushRewrap",
      "g w": "vim::PushRewrap",
      // "tab": "pane::ActivateNextItem",
      // "shift-tab": "pane::ActivatePrevItem",
    }
  }
  ```

assets/keymaps/vim.json

@@ -422,56 +422,66 @@
   {
     "context": "(vim_mode == helix_normal || vim_mode == helix_select) && !menu",
     "bindings": {
-      ";": "vim::HelixCollapseSelection",
-      ":": "command_palette::Toggle",
-      "m": "vim::PushHelixMatch",
-      "s": "vim::HelixSelectRegex",
-      "]": ["vim::PushHelixNext", { "around": true }],
-      "[": ["vim::PushHelixPrevious", { "around": true }],
-      "left": "vim::WrappingLeft",
-      "right": "vim::WrappingRight",
+      // Movement
       "h": "vim::WrappingLeft",
+      "left": "vim::WrappingLeft",
       "l": "vim::WrappingRight",
+      "right": "vim::WrappingRight",
+      "t": ["vim::PushFindForward", { "before": true, "multiline": true }],
+      "f": ["vim::PushFindForward", { "before": false, "multiline": true }],
+      "shift-t": ["vim::PushFindBackward", { "after": true, "multiline": true }],
+      "shift-f": ["vim::PushFindBackward", { "after": false, "multiline": true }],
+      "alt-.": "vim::RepeatFind",
+      
+      // Changes
+      "shift-r": "editor::Paste",
+      "`": "vim::ConvertToLowerCase",
+      "alt-`": "vim::ConvertToUpperCase",
+      "insert": "vim::InsertBefore",
+      "shift-u": "editor::Redo",
+      "ctrl-r": "vim::Redo",
       "y": "vim::HelixYank",
       "p": "vim::HelixPaste",
-      "shift-p": ["vim::HelixPaste", { "before": true }],
-      "alt-;": "vim::OtherEnd",
-      "ctrl-r": "vim::Redo",
-      "f": ["vim::PushFindForward", { "before": false, "multiline": true }],
-      "t": ["vim::PushFindForward", { "before": true, "multiline": true }],
-      "shift-f": ["vim::PushFindBackward", { "after": false, "multiline": true }],
-      "shift-t": ["vim::PushFindBackward", { "after": true, "multiline": true }],
+      "shift-p": ["vim::HelixPaste", { "before": true }],            
       ">": "vim::Indent",
       "<": "vim::Outdent",
       "=": "vim::AutoIndent",
-      "`": "vim::ConvertToLowerCase",
-      "alt-`": "vim::ConvertToUpperCase",
-      "g q": "vim::PushRewrap",
-      "g w": "vim::PushRewrap",
-      "insert": "vim::InsertBefore",
-      "alt-.": "vim::RepeatFind",
+      "d": "vim::HelixDelete",
+      "c": "vim::HelixSubstitute",
+      "alt-c": "vim::HelixSubstituteNoYank",
+      
+      // Selection manipulation
+      "s": "vim::HelixSelectRegex",
       "alt-s": ["editor::SplitSelectionIntoLines", { "keep_selections": true }],
+      ";": "vim::HelixCollapseSelection",
+      "alt-;": "vim::OtherEnd",
+      ",": "vim::HelixKeepNewestSelection",
+      "shift-c": "vim::HelixDuplicateBelow",
+      "alt-shift-c": "vim::HelixDuplicateAbove",
+      "%": "editor::SelectAll",
+      "x": "vim::HelixSelectLine",
+      "shift-x": "editor::SelectLine",
+      "ctrl-c": "editor::ToggleComments",
+      "alt-o": "editor::SelectLargerSyntaxNode",
+      "alt-i": "editor::SelectSmallerSyntaxNode",
+      "alt-p": "editor::SelectPreviousSyntaxNode",
+      "alt-n": "editor::SelectNextSyntaxNode",
+      
       // Goto mode
-      "g n": "pane::ActivateNextItem",
-      "g p": "pane::ActivatePreviousItem",
-      // "tab": "pane::ActivateNextItem",
-      // "shift-tab": "pane::ActivatePrevItem",
-      "shift-h": "pane::ActivatePreviousItem",
-      "shift-l": "pane::ActivateNextItem",
-      "g l": "vim::EndOfLine",
-      "g h": "vim::StartOfLine",
-      "g s": "vim::FirstNonWhitespace", // "g s" default behavior is "space s"
       "g e": "vim::EndOfDocument",
-      "g .": "vim::HelixGotoLastModification", // go to last modification
-      "g r": "editor::FindAllReferences", // zed specific
+      "g h": "vim::StartOfLine",
+      "g l": "vim::EndOfLine",
+      "g s": "vim::FirstNonWhitespace", // "g s" default behavior is "space s"
       "g t": "vim::WindowTop",
       "g c": "vim::WindowMiddle",
       "g b": "vim::WindowBottom",
-
-      "shift-r": "editor::Paste",
-      "x": "vim::HelixSelectLine",
-      "shift-x": "editor::SelectLine",
-      "%": "editor::SelectAll",
+      "g r": "editor::FindAllReferences", // zed specific
+      "g n": "pane::ActivateNextItem",
+      "shift-l": "pane::ActivateNextItem",      
+      "g p": "pane::ActivatePreviousItem",
+      "shift-h": "pane::ActivatePreviousItem",
+      "g .": "vim::HelixGotoLastModification", // go to last modification
+      
       // Window mode
       "space w h": "workspace::ActivatePaneLeft",
       "space w l": "workspace::ActivatePaneRight",
@@ -482,6 +492,7 @@
       "space w r": "pane::SplitRight",
       "space w v": "pane::SplitDown",
       "space w d": "pane::SplitDown",
+
       // Space mode
       "space f": "file_finder::Toggle",
       "space k": "editor::Hover",
@@ -492,16 +503,18 @@
       "space a": "editor::ToggleCodeActions",
       "space h": "editor::SelectAllMatches",
       "space c": "editor::ToggleComments",
-      "space y": "editor::Copy",
       "space p": "editor::Paste",
-      "shift-u": "editor::Redo",
-      "ctrl-c": "editor::ToggleComments",
-      "d": "vim::HelixDelete",
-      "c": "vim::HelixSubstitute",
-      "alt-c": "vim::HelixSubstituteNoYank",
-      "shift-c": "vim::HelixDuplicateBelow",
-      "alt-shift-c": "vim::HelixDuplicateAbove",
-      ",": "vim::HelixKeepNewestSelection"
+      "space y": "editor::Copy",
+
+      // Other
+      ":": "command_palette::Toggle",
+      "m": "vim::PushHelixMatch",
+      "]": ["vim::PushHelixNext", { "around": true }],
+      "[": ["vim::PushHelixPrevious", { "around": true }],
+      "g q": "vim::PushRewrap",
+      "g w": "vim::PushRewrap",
+      // "tab": "pane::ActivateNextItem",
+      // "shift-tab": "pane::ActivatePrevItem",
     }
   },
   {