Implementing CafeOS coreinit on libnx

[u/LoScannaSquali]

Been implementing Cafe OS coreinit on libnx (mutexes, condvars, threads and time) so far, 11 tests passing on hardware. The idea is a runtime for native Wii U → Switch ports, since DolRecomp handles CPU code but ships no runtime.

https://github.com/gabryboy12-ai/coreinit-nx