EOS-Contrib/eos_plugin_for_unity — reverse-engineered prompt

Build me a Unity plugin project that makes Epic Online Services easy to use in a real game, and also works as a demo app people can learn from. I want it to be something I can open in Unity 2021, plug into my own project, and use to connect players across platforms with the common EOS features already wired up.

Please include clean sample scenes for things like login and account connection, friends and presence, achievements, leaderboards, lobbies, peer to peer networking, player data storage, custom invites, metrics, logging, anti cheat setup info, and store or ecommerce where supported. The demo should make it obvious which features need an Epic account and which do not.

Make the setup straightforward, with sensible defaults, clear in editor configuration, and enough in project docs that a Unity developer can follow along without digging through source code. If there are features EOS does not support here yet, leave those out or mark them clearly. Look up current Epic and Unity docs online if you need to.