Create platform specific DLLs internally

[badcel]

Currently during runtime the operating system is checked for several string operations to decide how to decode a pointer of w_char_t data as the size of w_char_t is different between Linux / Mac and Windows.

It is possible to include runtime assemblies in nuget which are separted by runtime and only used during runtime. If the build process would generate a private DLL containing the code for a specific platform to read w_char_t data the operating system check would not need to happen during runtime but while loading the nuget the correct assembly with the correct code would be loaded and no check would need to happen.

See:

• https://learn.microsoft.com/en-us/dotnet/standard/assembly/reference-assemblies
• https://natemcmaster.com/blog/2016/05/19/nuget3-rid-graph/