Add JSON/NBT based configs to shaders

[Karpatok9089]

A JSON/NBT based shader config system would improve the shader customization. Adds: -lists (Example: Selecting modified ores to be emissive) -Compounds (Example: Customizing Block Light Strenght, color, etc.) -String (Example: Selecting an item which enables debug mode) Downsides: -More difficult config sharing This would be optional and only used when the shaderpack asks to