Added IO for global library functions

[fw2568]

new Trait HasSAPRfcLibrary<RT> with RfcLibraryIO containing methods:

Either<RfcError, System.Version> GetVersion();
Either<RfcError, Unit> SetTraceDirectory(string traceDirectory);
Either<RfcError, Unit> SetMaximumTraceFiles(int traceFiles);
Either<RfcError, Unit> SetCpicTraceLevel(int traceLevel);

Either<RfcError, Unit> LoadCryptoLibrary(string libraryPath);
Either<RfcError, Unit> SetIniDirectory(string iniDirectory);
Either<RfcError, Unit> ReloadRfcIni();