Added Instancing Support to StarMap using CLA and/or Environment Variables

[MrJeranimo]

Added the ability to switch which directory StarMap looks at for the manifest and mod loading. Also redirects KSA to the new instance folder.

You can now select which folder you want StarMap and KSA to look at for things like manifest.toml, \mods, settings.toml, \saves, \vehicles, \logs, \crashdumps, \HUDLayouts, etc.

This can be done either by using a Command Line Argument -> .\StarMap.exe -InstancePath C:\users\<user>\OneDrive\Documents\My Games\Instance A and StarMap, KSA, and all mods (as long as the mods use Constants.DocumentFolderPath or other variables/functions that derive from that) will now read/write to the new instance folder.

The other option is be setting the file path you want in an Environment Variable when launching StarMap. -> $env:INSTANCE_PATH = "C:\Users\<user>\OneDrive\Documents\My Games\Instance A"; .\StarMap.exe (this is for power shell).

This modification is done through a Harmony Patch of the Constants.DocumentsFolderPath getter which flows down to all relavent use cases that invole the Documents\My Games\Kitten Space Agency\ folder, and only provides the newly given path if it exists, otherwise it falls back to KSA's default getter.

[MrJeranimo]

This is the stale version of my pull request that was made on the main branch, not dev.