feat(signals): provide Dispatcher and Events at the platform level (#4978)

Author: markostanimirovic

modules/signals/events/spec/dispatcher.spec.ts

@@ -5,7 +5,7 @@ import { Dispatcher, event, Events } from '../src';
 import { ReducerEvents } from '../src/events-service';
 
 describe('Dispatcher', () => {
-  it('is provided at the root level', () => {
+  it('is provided globally', () => {
     const dispatcher = TestBed.inject(Dispatcher);
     expect(dispatcher).toBeDefined();
   });

modules/signals/events/spec/events-service.spec.ts

@@ -4,7 +4,7 @@ import { Dispatcher, event, EventInstance, Events } from '../src';
 import { SOURCE_TYPE } from '../src/events-service';
 
 describe('Events', () => {
-  it('is provided at the root level', () => {
+  it('is provided globally', () => {
     const events = TestBed.inject(Events);
     expect(events).toBeDefined();
   });

modules/signals/events/src/dispatcher.ts

@@ -26,7 +26,7 @@ import { Events, EVENTS, ReducerEvents } from './events-service';
  * }
  * ```
  */
-@Injectable({ providedIn: 'root' })
+@Injectable({ providedIn: 'platform' })
 export class Dispatcher {
   protected readonly reducerEvents = inject(ReducerEvents);
   protected readonly events = inject(Events);

modules/signals/events/src/events-service.ts

@@ -57,10 +57,10 @@ abstract class BaseEvents {
  * }
  * ```
  */
-@Injectable({ providedIn: 'root' })
+@Injectable({ providedIn: 'platform' })
 export class Events extends BaseEvents {}
 
-@Injectable({ providedIn: 'root' })
+@Injectable({ providedIn: 'platform' })
 export class ReducerEvents extends BaseEvents {}
 
 function filterByType<T extends EventInstance<string, unknown>>(