Lambent Lib

A bunch of QoL features (see wiki) Some performance changes

GemRender compat below:

• Added compatibility with GemRender on Minecraft 1.20.1 and 1.21.1.

• Added safeguards to prevent shader conflicts between Lambent and GemRender.

• Added fallback handling for shaders that fail to load with both mods installed.

• Fixed shader conflicts that could cause terrain and entities to stop rendering.

• Fixed lighting render targets interfering with each other when both mods are installed.

• Fixed Lambent overwriting GemRender's rendering settings.

• Improved fallback color handling when GemRender changes how surfaces are rendered.

• Surfaces lit by GemRender may appear slightly brighter under Lambent lighting.

• No changes were needed for 26.x.