[ENHANCEMENT] Find LimboPlayer by UUID

**Describe the feature you'd like to have implemented**
I want the “Limbo” interface to have a getPlayerByUUID() function to interact with a player outside of LimboSessionHandler

**Is your feature request related to an existing problem? Please describe.**
I write my authorization server on Nest.js and GRPC, and I need when GRPC receives confirmation from Nest.js in Minecraft Plugin, then I let the player to the main server (to Paper server).

I am writing Minecraft plugin on Velocity 1.21.3