feat(arm64): higher-half kernel, early MMU in boot, and VMM

Kernel/Source/Lib/String.c

@@ -8,15 +8,15 @@ static void BufferAdd(ASCII* buffer, Size bufferSize, Size* written, ASCII chara
     (*written)++;
 }
 
-void* StringSet(BytePointer destination, ASCII value, Size count) {
-    BytePointer savedDestination = destination;
+Pointer MemorySet(Pointer destination, ASCII value, Size count) {
+    BytePointer savedDestination = (BytePointer) destination;
     while (count--) {
-        *destination++ = (UInt8) value;
+        *savedDestination++ = (UInt8) value;
     }
-    return savedDestination;
+    return destination;
 }
 
-void* MemoryCopy(void* destination, const void* source, Size count) {
+Pointer MemoryCopy(Pointer destination, const Pointer source, Size count) {
     BytePointer destinationBuffer = (BytePointer) destination;
     const UInt8* sourceBuffer = (const UInt8*) source;