Add more shortcuts for editor::OrganizeImports (#26932)

Follow-up to:
- https://github.com/zed-industries/zed/pull/25793

Release Notes:

- N/A

assets/keymaps/linux/jetbrains.json

@@ -31,6 +31,7 @@
       "shift-alt-up": "editor::MoveLineUp",
       "shift-alt-down": "editor::MoveLineDown",
       "ctrl-alt-l": "editor::Format",
+      "ctrl-alt-o": "editor::OrganizeImports",
       "shift-f6": "editor::Rename",
       "ctrl-alt-left": "pane::GoBack",
       "ctrl-alt-right": "pane::GoForward",