feat: service worker preload scripts for improved extensions support (#44411)

* feat: preload scripts for service workers

* feat: service worker IPC

* test: service worker preload scripts and ipc

spec/fixtures/api/preload-realm/preload-tests.js

@@ -0,0 +1,34 @@
+const { contextBridge, ipcRenderer } = require('electron');
+
+const evalTests = {
+  evalConstructorName: () => globalThis.constructor.name
+};
+
+const tests = {
+  testSend: (name, ...args) => {
+    ipcRenderer.send(name, ...args);
+  },
+  testInvoke: async (name, ...args) => {
+    const result = await ipcRenderer.invoke(name, ...args);
+    return result;
+  },
+  testEvaluate: (testName, args) => {
+    const func = evalTests[testName];
+    const result = args
+      ? contextBridge.executeInMainWorld({ func, args })
+      : contextBridge.executeInMainWorld({ func });
+    return result;
+  }
+};
+
+ipcRenderer.on('test', async (_event, uuid, name, ...args) => {
+  console.debug(`running test ${name} for ${uuid}`);
+  try {
+    const result = await tests[name]?.(...args);
+    console.debug(`responding test ${name} for ${uuid}`);
+    ipcRenderer.send(`test-result-${uuid}`, { error: false, result });
+  } catch (error) {
+    console.debug(`erroring test ${name} for ${uuid}`);
+    ipcRenderer.send(`test-result-${uuid}`, { error: true, result: error.message });
+  }
+});