Better file overwrite notice

[timothebot]

The notice "This will potentially overwrite files in the process." is, in my opinion, not very informational.
I assume it means the game files, but it would be great to expand on it.

[toebeann]

Yeah it's mainly a placeholder for the v0, as to be more specific requires more work as each pack can have different files, as can each game, and each user might have changed things already... So it's just a heads up that if you've already customised stuff in the game folder, well, we're gonna mess around with it.
But yeah, it could be clearer. Generally speaking it's rare it will alter game files, only if the BepInEx pack you're installing includes game files. But for example If you've already put some version of BepInEx in the game folder, well, it might get overwritten, and if you've already customised the run_bepinex.sh, well, it's probably going to get overwritten, etc.

Definitely could be better :)