[SDK] Reorganize header files

SDK/INC/NT/ntrtl.h

@@ -0,0 +1,29 @@
+/*++
+
+Copyright (c) 2024, Quinn Stephens.
+Provided under the BSD 3-Clause license.
+
+Module Name:
+
+   ntrtl.h
+
+Abstract:
+
+   Provides NT RTL (Run-Time Library) definitions.
+
+--*/
+
+#ifndef _NTRTL_H
+#define _NTRTL_H
+
+#include <string.h>
+
+//
+// Memory operations.
+//
+#define RtlMoveMemory(Destination, Source, Length) memmove((Destination), (Source), (Length))
+#define RtlCopyMemory(Destination, Source, Length) memcpy((Destination), (Source), (Length))
+#define RtlFillMemory(Destination, Length, Fill)   memset((Destination), (Fill), (Length))
+#define RtlZeroMemory(Destination, Length)         memset((Destination), 0, (Length))
+
+#endif /* !_NTRTL_H */