Enhance testing and integration for checkbox-list custom field

- Updated Gitea workflow to trigger on pushes to the master branch and refined job configurations for testing and E2E processes.
- Added Jest and Playwright configurations for integration and E2E testing.
- Introduced new checkbox-item API with corresponding controller, service, and routes.
- Created integration tests for the checkbox-list functionality, ensuring proper handling of required fields and default values.
- Updated package.json and package-lock.json to include necessary dependencies for testing.

playground/jest.config.cjs

@@ -0,0 +1,6 @@
+module.exports = {
+  testEnvironment: 'node',
+  testMatch: ['<rootDir>/tests/integration/**/*.test.js'],
+  testTimeout: 120000,
+  verbose: true,
+};