v0.11.0-alpha — built-in test page + banner reload fix

Adds a generic, self-contained AdMob test/debug page served at /_admob/test (no Livewire/Inertia/CSRF dependency; drives the JS API + streams a live event log; default on outside production). Fixes the <x-admob::banner> reload-on-every-render loop - it now loads+shows once on init via /_admob/call and hides on navigation. Also converts stacked // comment blocks to /* */ (esp. config). 78 tests green. See CHANGELOG.