Add more keymaps from helix (#32453)

I added three additional keymaps to simulate helix behavior.

Release Notes:

- N/A

assets/keymaps/vim.json

@@ -395,6 +395,8 @@
       "ctrl-pagedown": "pane::ActivateNextItem",
       "ctrl-pageup": "pane::ActivatePreviousItem",
       "insert": "vim::InsertBefore",
+      ".": "vim::Repeat",
+      "alt-.": "vim::RepeatFind",
       // tree-sitter related commands
       "[ x": "editor::SelectLargerSyntaxNode",
       "] x": "editor::SelectSmallerSyntaxNode",
@@ -421,6 +423,7 @@
 
       "x": "editor::SelectLine",
       "shift-x": "editor::SelectLine",
+      "%": "editor::SelectAll",
       // Window mode
       "space w h": "workspace::ActivatePaneLeft",
       "space w l": "workspace::ActivatePaneRight",
@@ -450,7 +453,8 @@
       "ctrl-c": "editor::ToggleComments",
       "d": "vim::HelixDelete",
       "c": "vim::Substitute",
-      "shift-c": "editor::AddSelectionBelow"
+      "shift-c": "editor::AddSelectionBelow",
+      "alt-shift-c": "editor::AddSelectionAbove"
     }
   },
   {