Modular Golems - Alex's Caves compat restored

This mod simply restores the now-removed Alex's Caves integration to the 1.21.1 version of Modular Golems.

The original recipes and textures have been restored, and the abilities have been brought to 1.21.1.

This was made with Alex's Caves Continued, so I have no idea if there are issues when using a different 1.21.1 fork of Alex's Caves.

All credit goes to the original artist and author.

Code was primarily written by Claude, and checked over with human eyes.