Add KeyContextView (#19872)

Release Notes:

- Added `cmd-shift-p debug: Open Key Context View` to help debug custom
key bindings



https://github.com/user-attachments/assets/de273c97-5b27-45aa-9ff1-f943b0ed7dfe

crates/zed/src/zed.rs

@@ -68,7 +68,6 @@ actions!(
         Hide,
         HideOthers,
         Minimize,
-        OpenDefaultKeymap,
         OpenDefaultSettings,
         OpenProjectSettings,
         OpenProjectTasks,
@@ -474,7 +473,7 @@ pub fn initialize_workspace(
             .register_action(open_project_tasks_file)
             .register_action(
                 move |workspace: &mut Workspace,
-                      _: &OpenDefaultKeymap,
+                      _: &zed_actions::OpenDefaultKeymap,
                       cx: &mut ViewContext<Workspace>| {
                     open_bundled_file(
                         workspace,

crates/zed/src/zed/app_menus.rs

@@ -18,7 +18,10 @@ pub fn app_menus() -> Vec<Menu> {
                         MenuItem::action("Open Settings", super::OpenSettings),
                         MenuItem::action("Open Key Bindings", zed_actions::OpenKeymap),
                         MenuItem::action("Open Default Settings", super::OpenDefaultSettings),
-                        MenuItem::action("Open Default Key Bindings", super::OpenDefaultKeymap),
+                        MenuItem::action(
+                            "Open Default Key Bindings",
+                            zed_actions::OpenDefaultKeymap,
+                        ),
                         MenuItem::action("Open Project Settings", super::OpenProjectSettings),
                         MenuItem::action("Select Theme...", theme_selector::Toggle::default()),
                     ],