keymap_ui: Open Keymap editor from settings dropdown (#34576)

@probably-neb I guess we should be opening the keymap editor from title
bar and menu as well. I believe this got missed in this: #34568.

Release Notes:

- Open Keymap editor from settings from menu and title bar.

Cargo.lock

@@ -16452,6 +16452,7 @@ dependencies = [
  "schemars",
  "serde",
  "settings",
+ "settings_ui",
  "smallvec",
  "story",
  "telemetry",

crates/title_bar/Cargo.toml

@@ -40,6 +40,7 @@ rpc.workspace = true
 schemars.workspace = true
 serde.workspace = true
 settings.workspace = true
+settings_ui.workspace = true
 smallvec.workspace = true
 story = { workspace = true, optional = true }
 telemetry.workspace = true

crates/title_bar/src/title_bar.rs

@@ -30,6 +30,7 @@ use onboarding_banner::OnboardingBanner;
 use project::Project;
 use rpc::proto;
 use settings::Settings as _;
+use settings_ui::keybindings;
 use std::sync::Arc;
 use theme::ActiveTheme;
 use title_bar_settings::TitleBarSettings;
@@ -683,7 +684,7 @@ impl TitleBar {
                         )
                         .separator()
                         .action("Settings", zed_actions::OpenSettings.boxed_clone())
-                        .action("Key Bindings", Box::new(zed_actions::OpenKeymap))
+                        .action("Key Bindings", Box::new(keybindings::OpenKeymapEditor))
                         .action(
                             "Themes…",
                             zed_actions::theme_selector::Toggle::default().boxed_clone(),
@@ -727,7 +728,7 @@ impl TitleBar {
                 .menu(|window, cx| {
                     ContextMenu::build(window, cx, |menu, _, _| {
                         menu.action("Settings", zed_actions::OpenSettings.boxed_clone())
-                            .action("Key Bindings", Box::new(zed_actions::OpenKeymap))
+                            .action("Key Bindings", Box::new(keybindings::OpenKeymapEditor))
                             .action(
                                 "Themes…",
                                 zed_actions::theme_selector::Toggle::default().boxed_clone(),

crates/zed/src/zed/app_menus.rs

@@ -1,5 +1,6 @@
 use collab_ui::collab_panel;
 use gpui::{Menu, MenuItem, OsAction};
+use settings_ui::keybindings;
 use terminal_view::terminal_panel;
 
 pub fn app_menus() -> Vec<Menu> {
@@ -16,7 +17,7 @@ pub fn app_menus() -> Vec<Menu> {
                     name: "Settings".into(),
                     items: vec![
                         MenuItem::action("Open Settings", super::OpenSettings),
-                        MenuItem::action("Open Key Bindings", zed_actions::OpenKeymap),
+                        MenuItem::action("Open Key Bindings", keybindings::OpenKeymapEditor),
                         MenuItem::action("Open Default Settings", super::OpenDefaultSettings),
                         MenuItem::action(
                             "Open Default Key Bindings",