chore: split lighting shader

[Gistix]

Splits lighting shader file logically by techniques, while also taking care of reducing redundancy across them.

Its split into 5 shaders:

• EnvMap, MultilayerParallax and Eye
• MTLand and MTLandLODBlend
• LODLand, LODObjects, LODObjectHD and LODLandNoise
• TreeAnim
• Other techniques

Current status:

• Adjust shader cache to properly use the new shader paths
• Split shaders
• Cleanup
• Make shared logic into functions to reduce redundancy
• Make Lighting.PBR.hlsl as well (optional?)

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[github-actions]

No actionable suggestions for changed features.

[davo0411]

tv/parallax update will break this unfortunately. also would it be easier for us to make a new lighting folder for Lighting shaders?

[Gistix]

tv/parallax update will break this unfortunately. also would it be easier for us to make a new lighting folder for Lighting shaders?

I used a script to split the shaders (which is why it requires manual cleaning), I'll run it again after tv/parallax update is merged
Yes it could be done, we'd just have to change the path function in ShaderCache