edit predictions: Add binding to the prediction toggle (#24468)

This PR primary goal is to add a keybinding to the (ephemeral)
prediction toggle. In doing that, we also standardized the keybinding to
open the status bar menu with it.

Release Notes:

- N/A

---------

Co-authored-by: Bennet Bo Fenner <53836821+bennetbo@users.noreply.github.com>

assets/keymaps/default-linux.json

@@ -122,7 +122,8 @@
       "ctrl-i": "editor::ShowSignatureHelp",
       "alt-g b": "editor::ToggleGitBlame",
       "menu": "editor::OpenContextMenu",
-      "shift-f10": "editor::OpenContextMenu"
+      "shift-f10": "editor::OpenContextMenu",
+      "ctrl-shift-e": "editor::ToggleEditPrediction"
     }
   },
   {
@@ -535,8 +536,7 @@
   {
     "bindings": {
       "ctrl-alt-shift-f": "workspace::FollowNextCollaborator",
-      "ctrl-alt-i": "zed::DebugElements",
-      "ctrl-:": "editor::ToggleInlayHints"
+      "ctrl-alt-i": "zed::DebugElements"
     }
   },
   {
@@ -554,7 +554,8 @@
       "ctrl-shift-e": "pane::RevealInProjectPanel",
       "ctrl-f8": "editor::GoToHunk",
       "ctrl-shift-f8": "editor::GoToPrevHunk",
-      "ctrl-enter": "assistant::InlineAssist"
+      "ctrl-enter": "assistant::InlineAssist",
+      "ctrl-:": "editor::ToggleInlayHints"
     }
   },
   {