[World Generator] Frozen Hell

Based on a Spanish author's, namely joakox98's neat data pack I could make a temperature system work fitting to the cold environment.

The player's body temperature constantly drops in cold biomes and if it goes very low, the player will take freezing damage.

This won't kill the player but similarly to poisoning will leave them with half heart, basically half dead.

To fill up the heat bar one need to stay over 12 light level for example standing next to torches, campfires, glowstones etc.

To avoid freezing one can hold any light block except for campfire in either of their hands. 

This won't fill up the temperature meter but will keep it at a level.