Cursor keymap (#31702)

To use this, spawn `weclome: toggle base keymap selector` from the
command palette.

<img width="589" alt="Screenshot 2025-05-29 at 14 07 35"
src="https://github.com/user-attachments/assets/0d4c4eff-6a3b-40f4-9032-5d8ca7664d20"
/>

MacOS is well tested to match Cursor. The [curors keymap
documentation](https://docs.cursor.com/kbd) is does not explicitly state
windows/linux keymap entries only "All Cmd keys can be replaced with
Ctrl on Windows." so that is what we've done. We welcome feedback /
refinements.

Note, because this provides a mapping for `cmd-k` (macos) and `ctrl-k`
(linux/windows) using this keymap will disable all of the default
chorded keymap entries which have `cmd-k` / `ctrl-k` as a prefix. For
example `cmd-k cmd-s` for open keymap will no longer function.

Release Notes:

- Added Cursor compatibility keymap

---------

Co-authored-by: Joseph Lyons <joseph@zed.dev>

assets/keymaps/default-linux.json

@@ -127,9 +127,7 @@
       "shift-f10": "editor::OpenContextMenu",
       "ctrl-shift-e": "editor::ToggleEditPrediction",
       "f9": "editor::ToggleBreakpoint",
-      "shift-f9": "editor::EditLogBreakpoint",
-      "ctrl-shift-backspace": "editor::GoToPreviousChange",
-      "ctrl-shift-alt-backspace": "editor::GoToNextChange"
+      "shift-f9": "editor::EditLogBreakpoint"
     }
   },
   {
@@ -148,6 +146,8 @@
       "ctrl->": "assistant::QuoteSelection",
       "ctrl-<": "assistant::InsertIntoEditor",
       "ctrl-alt-e": "editor::SelectEnclosingSymbol",
+      "ctrl-shift-backspace": "editor::GoToPreviousChange",
+      "ctrl-shift-alt-backspace": "editor::GoToNextChange",
       "alt-enter": "editor::OpenSelectionsInMultibuffer"
     }
   },