Better Models & Textures

**Ghost Lantern** model and texture are very messy and not animated atm.

**Ghost Lanterns** and **Wisps** could also have more models, which would change according to their level. They already have the _BlockState_ code for it.

Still don't really want to use any library (like **GeckoLib**) in order to keep this mod lightweight.

Start by locating the Ghost Lantern, Ghost Lanterns, and Wisps model, texture, animation, and existing BlockState code; the issue names no files or tests. Review how level-based variants currently work before deciding the scope. Done means cleaner animated assets, additional level-dependent models where appropriate, and no GeckoLib dependency.

Written by the indexing model from the issue text.