[SDK] Fix the implementation of the FsRtlIsAnsiCharacter* macros. These macros should be implemented using the FsRtlTestAnsiCharacter() macro that performs extended tests, especially for buffer overruns. This fixes FsRtlIsAnsiCharacterWild(), FsRtlIsAnsiCharacterLegalFat(), FsRtlIsAnsiCharacterLegalHpfs(), FsRtlIsAnsiCharacterLegalNtfs(). CORE-14067
Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers into modules, and delete rossubsys.