Updates to latest BepInEx 6 with IL2CPP support using .net framework 4.8

[HKunogi]

Works on latest version of bepinex, including il2cpp. Remarks: You should use the #ref comment at start of the file and reference the unhollowed libraries of the game to be able to compile the plugins properly at runtime. PS: This works well on IL2CPP games but won't work on mono anymore, so prob will be good to put into a separate branch, so keep 2 branchs, IL2CPP and MONO versions, as both has different handlings of it.