Minor and Major changes around internals for slots, AccessoryNest, fixes and more

Fixes:

• Fix for first person cosmetic override not working
• Resolve issues with enchantments are applied twice
• Fix issues with rendering for entity at night in Accessories screen
• Fix for duplicate attribute tooltips when stackable

General Changes:

• Add ability to toggle Accessory Features like totem, banner, and glider from a new command feature
• Add proper support for new mannequins

API Changes:

• Adjust AccessoryNestUtils to be public and add proper documentation combined with overhaul to how the API functions
• Add TooltipFlag adjustments to check if the client is holding certain modifiers
• Adjust internals of EndecDataLoader to be more inline with hoiw registry access should be handled optionally
• Resolve version mismatch of endec libs leading to issues with launching the game in dev