Local actions (#57451)

* feat: 🎸 create UiActionsService

* feat: 🎸 add UiActionsServvice.fork() method

* feat: 🎸 instantiate UiActionsService in plugin

* feat: 🎸 add UiActionsService.registerTrigger(), remove old

* feat: 🎸 move attach/detachAction() methods to UiActionsService

* refactor: 💡 move remaining actions API to UiActionsService

* chore: 🤖 clean up /trigger folder

* test: 💍 move registry tests into UiActiosnService tests

* fix: 🐛 fix TypeScript typecheck errors

* test: 💍 add .fork() trigger tests

* feat: 🎸 remove actionIds from ui_actions Trigger interface

* fix: 🐛 remove usage of actionIds

* fix: 🐛 attach hello world action to trigger in plugin lifecycle

* feat: 🎸 fork also trigger to action attachments

* fix: 🐛 clear mapping registry in .clear(), improve type

examples/ui_actions_explorer/public/plugin.tsx

@@ -56,15 +56,12 @@ export class UiActionsExplorerPlugin implements Plugin<void, void, {}, StartDeps
   public setup(core: CoreSetup<{ uiActions: UiActionsStart }>, deps: SetupDeps) {
     deps.uiActions.registerTrigger({
       id: COUNTRY_TRIGGER,
-      actionIds: [],
     });
     deps.uiActions.registerTrigger({
       id: PHONE_TRIGGER,
-      actionIds: [],
     });
     deps.uiActions.registerTrigger({
       id: USER_TRIGGER,
-      actionIds: [],
     });
     deps.uiActions.registerAction(lookUpWeatherAction);
     deps.uiActions.registerAction(viewInMapsAction);