Provide estimation for pixel per degree

Maybe it's possible on some platforms to find out what type of device the application is running on - ie phone, TV, monitor.

Start by reviewing the Flutter plugin's platform-specific entry points and how it currently determines physical screen size. Investigate whether the relevant platforms expose device type or pixel-density data, then define and test behavior for phone, TV, and monitor cases. Done means the plugin provides a documented estimation where platform data supports it.

Written by the indexing model from the issue text.