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/explore.test.e2e.js

@@ -1,6 +1,12 @@
 // @ts-check
 // document is a global in evaluate, so it's safe to ignore here
 // eslint playwright/no-conditional-in-test: 0
+
+// @watch start
+// templates/explore/**
+// web_src/modules/fomantic/**
+// @watch end
+
 import {expect} from '@playwright/test';
 import {test} from './utils_e2e.js';