ModLabsCC/KPaper ? reverse-engineered prompt

Build me a Kotlin utility library for Paper plugin development that makes common plugin tasks feel much easier and cleaner.

I want a small but powerful toolkit for things like simple event listeners, custom events, command registration, inventory GUIs, item building, message formatting, and a few helpful Kotlin extensions for Paper and Bukkit classes. It should feel very Kotlin friendly, support async work with coroutines, and make it easy to create things like welcome messages, shop menus, countdowns, and simple world or player utilities without writing tons of boilerplate.

Please set it up so a plugin can extend one main base class and start registering features in a straightforward way. Include clear examples and enough documentation so someone can copy the patterns into their own Paper plugin quickly. If you need current Paper or Kotlin details, look up the latest docs online first.