Indium – Indium 1.0.2-alpha3 for Minecraft 1.18.1/Sodium 0.4.0-alpha6

– Optimize terrain building by using Sodium’s ChunkModelBuilder directly
– Fix compatibility with Sodium’s “animate only visible textures” option
– Port recent Indigo bug fixes
– Restructure and rename classes to be more consistent
– Update build dependencies and gitignore
– Add FREX incompatibility error message