Explore UniTask as an alternative to WebGL Threading Patcher

[kantagara]

Summary Got a suggestion on Discord to actually try UniTask, Seems like a way better solution than threading patcher (less hacky)

Motivation Seems like UniTask supports webGL OOB, so doing async await trough it should be better and less hacky

Acceptance Criteria

• [ ] UniTask integrated and WebGL Threading Patcher is out!