PreySystem

I decided to make my own free prey attachment based on Killer Kobold's version, but more optimized, contain only a single light, and gives the prey full control over if they want to allow digestion from the predator's system or not (to help prevent endo preys from being digested without consent).

Changelog:
Version 1.1:
- Added Swallowed as a Digestion State in the Digestion contacts.
- Added a customization layer for avatars to use when the PreySystem detects the current Digestion State they are in from their Predator's Vore System. This is so Avatars can have special animation clips like material dissolves to simulate the prey actually melting inside their predator.
Version 1.0:
- Added single light to the system that acts as a spotlight.
- A single immersion material that changes colors depending on type of vore detected (system sends the desired color).
- Added sound effects like heartbeat, and under-liquid effect sounds to add to the immersion of prey.
- Added total prey control over Digestion which is meant to QoL all existing VRChat Vore Systems including Killer Kobold, etc.
- Added a toggle for Willing/Unwilling prey as well as for swapping from Female prey to Male prey that can be used depending on the prey's preferences. Default is Willing & Female.
- Uses a single animation layer that plays prey audio clips.
- Added Digestion contacts that can be sent by the vore system that is exactly like Killer Kobold's PreyThing for partial support for systems implementing support for Killer Kobold's PreyThing.

Known Issues:
- The immersion material may not display at all for some preys which I have not figured out the proper solution to it yet. Any help to fix this would be appreciated.
- The single animation layer that plays prey audio clips does not play any sounds at the moment due to lacking voice lines for preys. This is due to needing volunteers who would not mind voicing male and female preys using common and universal prey voice lines (ones that can be used for any type of vore). Each audio clip should be no longer than 10 seconds at least.