Include code cache for preload bundle

Co-authored-by: Scott Nonnenberg <scott@signal.org>

ts/scripts/generate-preload-cache.ts

@@ -0,0 +1,35 @@
+// Copyright 2024 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { pathToFileURL } from 'node:url';
+import { join } from 'node:path';
+import { app, BrowserWindow, ipcMain } from 'electron';
+
+app.on('ready', async () => {
+  ipcMain.handle('done', () => {
+    app.quit();
+  });
+
+  ipcMain.handle('error', (_event, err) => {
+    console.error(err);
+    process.exit(1);
+  });
+
+  const window = new BrowserWindow({
+    show: false,
+    webPreferences: {
+      devTools: true,
+      nodeIntegration: false,
+      sandbox: false,
+      contextIsolation: true,
+      preload: join(__dirname, 'generate-preload-cache.preload.js'),
+    },
+  });
+
+  await window.loadURL(
+    pathToFileURL(join(__dirname, 'generate-preload-cache.html')).toString()
+  );
+
+  window.webContents.openDevTools();
+  window.webContents.send('compile', process.argv[2], process.argv[3]);
+});