vim: Add ZZ and ZQ

The major change here is a refactoring to allow controling the save
behaviour when closing items, which is pre-work needed for vim command
palette.

For zed-industries/community#1868

crates/terminal_view/src/terminal_view.rs

@@ -283,7 +283,12 @@ impl TerminalView {
     pub fn deploy_context_menu(&mut self, position: Vector2F, cx: &mut ViewContext<Self>) {
         let menu_entries = vec![
             ContextMenuItem::action("Clear", Clear),
-            ContextMenuItem::action("Close", pane::CloseActiveItem),
+            ContextMenuItem::action(
+                "Close",
+                pane::CloseActiveItem {
+                    save_behavior: None,
+                },
+            ),
         ];
 
         self.context_menu.update(cx, |menu, cx| {