editor: Add Organize Imports Action (#25793)

Closes #10004

This PR adds support for the organize imports action. Previously, you
had to manually configure it in the settings and then use format to run
it.

Note: Default key binding will be `alt-shift-o` which is similar to
VSCode's organize import. Also, because `cmd-shift-o` is taken by
outline picker.

Todo:

- [x] Initial working
- [x] Handle remote
- [x] Handle multi buffer
- [x] Can we make it generic for executing any code action?

Release Notes:

- Added `editor:OrganizeImports` action to organize imports (sort,
remove unused, etc) for supported LSPs. You can trigger it by using the
`alt-shift-o` key binding.

crates/editor/src/element.rs

@@ -429,6 +429,13 @@ impl EditorElement {
                 cx.propagate();
             }
         });
+        register_action(editor, window, |editor, action, window, cx| {
+            if let Some(task) = editor.organize_imports(action, window, cx) {
+                task.detach_and_notify_err(window, cx);
+            } else {
+                cx.propagate();
+            }
+        });
         register_action(editor, window, Editor::restart_language_server);
         register_action(editor, window, Editor::show_character_palette);
         register_action(editor, window, |editor, action, window, cx| {