Ars Elemental

While it still contains some wip stuff, it shouldn't affect gameplay unless enabled in the config. Marking as release to slowly reduce the risk of Sauce-Crashing

- Updated Anima essence and logo
- Fixed few missing entries in the documentation
- Support for multiple sources of repulsion for the ritual

Beta content:
- Vexing Caves added to the list of the biomes generated when the Archwoods Biome are active. Mostly an underground biome, might pop a bit on the surface. High wilden population and full of sourceberry and sourcestone formations. Supported by the Archwood Island ritual if you want the biome properties without its worldgen (spawns / water-grass colors / etc.).
- Light and Heavy armor variants, hidden unless the config in ars_elemental_startup is changed. Straight upgrades in terms of slots and defense compared to the base ars counterparts, plus passive effects geared toward a glass cannon / tank style.

- Flashjack is a new familiar, can be found in Flashing Archwood Forests (if you have biomes disabled, you may use a mix of archwood island and summon animal rituals). Wip job for the worker version, i suggest using it just as familiar or decoration for the moment.