[WIN32K][WIN32U] Fix system call ids (#5287) - Delete the win32ksvc-ros.h file, which was not used - Use a separate file for x64 (based on 2k3 x64 free) - Delete w32ksvc.db. It's unused since ages.
Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers into modules, and delete rossubsys.