Playwright Codegen and CI setup

- Improved the Codegen setup
  - Removed the app-launch related boilerplate from tests
  - Enable recording mode by default
  - Option to provide the test file name to save the recording
- Added GitHub workflow to run Playwright tests with Electron in
  Headless mode(mocking display using `xvfb`).

playwright/codegen.ts

@@ -0,0 +1,13 @@
+const path = require('path');
+const { startApp } = require('./electron.ts');
+
+async function main() {
+  const { app, context } = await startApp();
+  let outputFile = process.argv[2]?.trim();
+  if (outputFile && !/\.(ts|js)$/.test(outputFile)) {
+    outputFile = path.join(__dirname, '../e2e-tests/', outputFile + '.spec.ts');
+  }
+  await context._enableRecorder({ language: 'playwright-test', mode: 'recording', outputFile });
+}
+
+main();