macos: Add mappings for alt-delete and cmd-delete (#34493)

Peter Tripp created 

Closes https://github.com/zed-industries/zed/issues/34484

Release Notes:

- macos: Add default mappings for `alt-delete` and `cmd-delete` in
Terminal (delete word to right; delete to end of line)

Change summary

assets/keymaps/default-macos.json | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

Detailed changes

assets/keymaps/default-macos.json 🔗 

@@ -1105,7 +1105,9 @@
       "ctrl-enter": "assistant::InlineAssist",
       "ctrl-_": null, // emacs undo
       // Some nice conveniences
-      "cmd-backspace": ["terminal::SendText", "\u0015"],
+      "cmd-backspace": ["terminal::SendText", "\u0015"], // ctrl-u: clear line
+      "alt-delete": ["terminal::SendText", "\u001bd"], // alt-d: delete word forward
+      "cmd-delete": ["terminal::SendText", "\u000b"], // ctrl-k: delete to end of line
       "cmd-right": ["terminal::SendText", "\u0005"],
       "cmd-left": ["terminal::SendText", "\u0001"],
       // Terminal.app compatibility