docs: update elements to use `@publicApi` tags (#26595)

PR Close #26595

tools/public_api_guard/elements/elements.d.ts

@@ -1,7 +1,5 @@
-/** @experimental */
 export declare function createCustomElement<P>(component: Type<any>, config: NgElementConfig): NgElementConstructor<P>;
 
-/** @experimental */
 export declare abstract class NgElement extends HTMLElement {
     protected ngElementEventsSubscription: Subscription | null;
     protected ngElementStrategy: NgElementStrategy;
@@ -10,19 +8,16 @@ export declare abstract class NgElement extends HTMLElement {
     abstract disconnectedCallback(): void;
 }
 
-/** @experimental */
 export interface NgElementConfig {
     injector: Injector;
     strategyFactory?: NgElementStrategyFactory;
 }
 
-/** @experimental */
 export interface NgElementConstructor<P> {
     readonly observedAttributes: string[];
     new (injector: Injector): NgElement & WithProperties<P>;
 }
 
-/** @experimental */
 export interface NgElementStrategy {
     events: Observable<NgElementStrategyEvent>;
     connect(element: HTMLElement): void;
@@ -31,21 +26,17 @@ export interface NgElementStrategy {
     setInputValue(propName: string, value: string): void;
 }
 
-/** @experimental */
 export interface NgElementStrategyEvent {
     name: string;
     value: any;
 }
 
-/** @experimental */
 export interface NgElementStrategyFactory {
     create(injector: Injector): NgElementStrategy;
 }
 
-/** @experimental */
 export declare const VERSION: Version;
 
-/** @experimental */
 export declare type WithProperties<P> = {
     [property in keyof P]: P[property];
 };