Allow canceling in-progress language server work (e.g. cargo check) (#13173)

Release Notes:

- Added a more detailed message in place of the generic `checking...`
messages when Rust-analyzer is running.
- Added a rate limit for language server status messages, to reduce
noisiness of those updates.
- Added a `cancel language server work` action which will cancel
long-running language server tasks.

---------

Co-authored-by: Richard <richard@zed.dev>

crates/editor/src/actions.rs

@@ -169,6 +169,7 @@ gpui::actions!(
         AddSelectionBelow,
         Backspace,
         Cancel,
+        CancelLanguageServerWork,
         ConfirmRename,
         ContextMenuFirst,
         ContextMenuLast,

crates/editor/src/editor.rs

@@ -9494,6 +9494,20 @@ impl Editor {
         }
     }
 
+    fn cancel_language_server_work(
+        &mut self,
+        _: &CancelLanguageServerWork,
+        cx: &mut ViewContext<Self>,
+    ) {
+        if let Some(project) = self.project.clone() {
+            self.buffer.update(cx, |multi_buffer, cx| {
+                project.update(cx, |project, cx| {
+                    project.cancel_language_server_work_for_buffers(multi_buffer.all_buffers(), cx);
+                });
+            })
+        }
+    }
+
     fn show_character_palette(&mut self, _: &ShowCharacterPalette, cx: &mut ViewContext<Self>) {
         cx.show_character_palette();
     }

crates/editor/src/element.rs

@@ -341,6 +341,7 @@ impl EditorElement {
             }
         });
         register_action(view, cx, Editor::restart_language_server);
+        register_action(view, cx, Editor::cancel_language_server_work);
         register_action(view, cx, Editor::show_character_palette);
         register_action(view, cx, |editor, action, cx| {
             if let Some(task) = editor.confirm_completion(action, cx) {