Missing Pro Features should have more actionable error messages

[thkruz]

The error message could be more actionable. Consider providing specific guidance on how to configure the .env file or where to find documentation about Pro plugin setup.

      'Telemetry plugin is a Pro feature. To enable it, ensure your .env file includes a valid PRO_LICENSE_KEY and that you have access to the Pro plugin files. For setup instructions, visit: https://docs.example.com/pro-plugin-setup',

Originally posted in #1205 (comment)