feat: remove Cache API, rework preload(), cancel() and fetch() (#25289)

* feat: remove Cache API, rework preload(), cancel() and fetch()

perf - replace broadcast channel with direct postMessage

* remove sw response handling

* review comments

web/src/lib/utils/sw-messenger.ts

@@ -0,0 +1,17 @@
+export class ServiceWorkerMessenger {
+  readonly #serviceWorker: ServiceWorkerContainer;
+
+  constructor(serviceWorker: ServiceWorkerContainer) {
+    this.#serviceWorker = serviceWorker;
+  }
+
+  /**
+   * Send a one-way message to the service worker.
+   */
+  send(type: string, data: Record<string, unknown>) {
+    this.#serviceWorker.controller?.postMessage({
+      type,
+      ...data,
+    });
+  }
+}