Whispers quest

[GabeHasWon]

### Link Issues Resolves: #453

Description of Work

• Add Morven NPC, dialogue and gores
• Add Pathfinding class for instanced pathfinding
• Add in RealtimeGen system for real time generation
• Add in Whispers of the Deep quest
• Add in "chasm" gen for above quest
• Syncs a bunch of stuff originating in and outside of this commit
• Improves Eater domain a lot (stalactites are STUPIDLY programmed in vanilla)
• Fixes issue where killing Eater of Worlds wouldn't count as a kill
• Adds in MiscOverlayUI for...misc overlay UI
• Fixes issue where persistent return location would kill you by fall damage with substantial Y differences
• Fixes issue where players on the load screen enabled quests, breaking the loading for every other player
• Adds in mechanic that disables breaking Shadow Orbs until after the quest is half-done
• Misc cleanup & bugfixing I probably missed

Comments

Big PR. Whoops! Couple notes:

1. The pathfinder uses a collision check that's a bit faulty. If Morven or the player stand on a slope, the check will say there's intersection despite there being none, stopping Morven from moving until the slope is gone or the player moves off of it. I couldn't find a way to fix this, with the remnants of my work in the CollisionHooks class.
2. Morven (+ gores and stuck tile) and the EoW portal both need nice sprites.
3. I would like this pretty heavily QA'd in multiplayer, I made sure it functioned minimally and consistently but I may've missed some thing(s).