tests(e2e): Allow tests to run only on file changes

- supports glob patterns in testfiles
- only runs tests on changes
- always runs tests without specified patterns

tests(e2e): refactor global watch patterns

tests(e2e): add watch patterns to test files

tests/e2e/example.test.e2e.js

@@ -1,4 +1,11 @@
 // @ts-check
+
+// @watch start
+// templates/user/auth/**
+// web_src/js/features/user-**
+// modules/{user,auth}/**
+// @watch end
+
 import {expect} from '@playwright/test';
 import {test, login_user, save_visual} from './utils_e2e.js';