Build fix for v0.4.0

[JaXt0r]

Hi Raicuparta.

I tried to build UUVR from main branch but failed locally.
(Everyone can nag, therefore I tried to solve these build time issues instead. 😉)

This PR includes:

1. fixing issues related to ThingDisabler.cs
   • wrap missing PropertyInfo functions for legacy-mono .net version
   • fix Invalid cast for Il2CppSystem.Type on IL2CPP builds
2. add the capability to set output directory to a custom one when needed (via .gitignored Directory.Build.props.user file.)

Note

Building the UUVR mods from within Rider works and I get proper DLLs created. I also tested my changes with legacy-mono and it works perfectly. (My tested game Yooka-Laylee starts and has stereoscopic VR)

Thank you for your work
JaXt0r