Add open vim keymap command (#9953)

Release Notes:

- Added a `vim: open default keymap` command to show the default Vim
keymap ([#8593](https://github.com/zed-industries/zed/issues/8593)).

Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>

crates/workspace/src/workspace.rs

@@ -521,6 +521,11 @@ pub enum Event {
     ContactRequestedJoin(u64),
     WorkspaceCreated(WeakView<Workspace>),
     SpawnTask(SpawnInTerminal),
+    OpenBundledFile {
+        text: Cow<'static, str>,
+        title: &'static str,
+        language: &'static str,
+    },
     ZoomChanged,
 }