ConstExtends the base Playwright test with a browserBind test-scoped fixture.
When PRAMAN_BIND=1, calls browser.bind(title) (Playwright 1.59+) to expose
the browser to Playwright CLI agents and logs the endpoint URL.
No mergeTests() required — this fixture only depends on the Playwright
built-in browser fixture.
Playwright test object extended with the
browserBindfixture.