title_bar: Remove dependency on command_palette (#21006)

This PR removes the `title_bar` crate's dependency on the
`command_palette`.

The `command_palette::Toggle` action now resides at
`zed_actions::command_palette::Toggle`.

Release Notes:

- N/A

crates/title_bar/Cargo.toml

@@ -31,7 +31,6 @@ test-support = [
 auto_update.workspace = true
 call.workspace = true
 client.workspace = true
-command_palette.workspace = true
 feedback.workspace = true
 feature_flags.workspace = true
 gpui.workspace = true

crates/title_bar/src/application_menu.rs

@@ -18,7 +18,10 @@ impl Render for ApplicationMenu {
             .menu(move |cx| {
                 ContextMenu::build(cx, move |menu, cx| {
                     menu.header("Workspace")
-                        .action("Open Command Palette", Box::new(command_palette::Toggle))
+                        .action(
+                            "Open Command Palette",
+                            Box::new(zed_actions::command_palette::Toggle),
+                        )
                         .when_some(cx.focused(), |menu, focused| menu.context(focused))
                         .custom_row(move |cx| {
                             h_flex()