DROP-IN INSTALLER v2

How to install:
1) Upload and extract in your project root.
2) Open: https://yourdomain.com/install
3) Complete steps.
4) Delete /install folder (recommended).
5) Add to the top of your app entry file:
   require __DIR__ . '/license/license_check.php';
   enforce_license();

Notes:
- Config is written to /config/config.php
- License result is cached in /license/license_cache.json
