message: docs(http): add public API tags and jsdoc for `provideHttpClient`
  This commit adds documentation and API tagging for `provideHttpClient` and
  the `with*` feature functions.
  PR Close
diff: @@ -66,6 +66,10 @@ export interface HttpInterceptor {
  * This function should only be called within the scope of the request that's currently being
  * intercepted. Once that request is complete, this downstream handler function should not be
  * called.
  + *
  + * @publicApi
  + *
  + * @see [HTTP Guide](guide/http#intercepting-requests-and-responses)
  */
  export type HttpHandlerFn = (req: HttpRequest<unknown>) => Observable<HttpEvent<unknown>>;
  