BiomeTag.(water_)fog_color tag + mech

[tal5]

Requested on Discord.

Additions

• BiomeNMS#get/setFogColor - controls a biome's fog color as an RGB int, implemented on 1.19 and 1.20.
• BiomeNMS#get/setWaterFogColor - controls a biome's water fog color as an RGB int, implemented on 1.19 and 1.20.
• BiomeTag.fog_color tag + mechanism pair - controls a biome's fog color, on 1.19+.
• BiomeTag.water_fog_color tag + mechanism pair - controls a biome's water fog color, on 1.19+.

Changes

• (Unrelated minor cleanup) removed the redundant try/catch around ReflectionHelper#setFieldValue in BiomeNMSImpl(1.19/1.20)#setFoliageColor.