Adds a new subset of Toxic planets to the universe, these worlds suffer from acid rain and are desolate wastelands of poisonous water and the remains of an over-polluted world.

Changelog
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1.1
-Added new randomly destroyed structures to the Toxic Biomes
-Added Beta/Gamma/X spawning for Toxic Biomes
-Replaced rustymetal with rustyblock on Toxic biome
-Fixed an issue with the Acid not appearing while in orbit of the planet
-Fixed an issue with the underground parallax on Toxic worlds