Ability Set Log File for Steam Deck / Linux

[chibiskuld]

Explain in detail what your suggested feature would be used for.

Fixes most issues for running VRCX on the Steam Deck and Linux OS. A lot of VRCX features do not function on these two systems due to the inability to find the log file. Currently in logwatcher.cs it is simply set to:

var logPath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData) + @"Low\VRChat\VRChat";

But it would be reasonable to have an override for this.

Describe how it would look if it requires a UI.

It would be a button to open a simple browser object to select the folder. Also Maybe something to revert it to the default location if someone accidentally sets it to something wrong.

Explain why people would want to use it.

This would allow VRCX to work for the steam deck and Linux.