[FEAT.] : Add an option to manage AppData

[UrkiMimi]

Problem

Recently, I've been experimenting with pre-1.0.0 versions (Mostly for making tools for a couple of friends) and forgot the game doesn't handle the AppData best when you jump around to geriatric versions of the game. [Ex. 1.39.0 -> 0.13.2]

Solution

I think implementing an AppData backup feature similar to BSLL would be nice to have since it is a bit tedious to open up Explorer and scavenge around to find it and back it up yourself.

Alternative Solution

Two other ways this could be executed is including a shortcut to the Beat Saber AppData folder or backing it up per game (Though this was mentioned in issue #238)

Operating System

Windows

Additional Context

No response