Merge pull request #24875 from abpframework/issue/add-theme-token

Angular - Adding the theme change token

npm/ng-packs/packages/theme-shared/src/lib/tokens/index.ts

@@ -4,3 +4,4 @@ export * from './ngx-datatable-messages.token';
 export * from './suppress-unsaved-changes-warning.token';
 export * from './confirmation-icons.token';
 export * from './logo.token';
+export * from './theme-change.token';

npm/ng-packs/packages/theme-shared/src/lib/tokens/theme-change.token.ts

@@ -0,0 +1,6 @@
+import { InjectionToken } from '@angular/core';
+import { Observable } from 'rxjs';
+
+export const THEME_CHANGE_TOKEN = new InjectionToken<Observable<{ styleName: string }>>(
+  'THEME_CHANGE_TOKEN',
+);