Add editor::Rewrap binding to Emacs keymaps (#33588)

`M-q` is `fill-paragraph` which is like `editor::Rewrap`.

Release Notes:

- emacs: Bound `alt-q` to `editor::Rewrap` (like `M-q` or `M-x
fill-paragraph`)

assets/keymaps/linux/emacs.json

@@ -59,7 +59,8 @@
       "alt->": "editor::MoveToEnd", // end-of-buffer
       "ctrl-l": "editor::ScrollCursorCenterTopBottom", // recenter-top-bottom
       "ctrl-s": "buffer_search::Deploy", // isearch-forward
-      "alt-^": "editor::JoinLines" // join-line
+      "alt-^": "editor::JoinLines", // join-line
+      "alt-q": "editor::Rewrap" // fill-paragraph
     }
   },
   {

assets/keymaps/macos/emacs.json

@@ -59,7 +59,8 @@
       "alt->": "editor::MoveToEnd", // end-of-buffer
       "ctrl-l": "editor::ScrollCursorCenterTopBottom", // recenter-top-bottom
       "ctrl-s": "buffer_search::Deploy", // isearch-forward
-      "alt-^": "editor::JoinLines" // join-line
+      "alt-^": "editor::JoinLines", // join-line
+      "alt-q": "editor::Rewrap" // fill-paragraph
     }
   },
   {