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

Kernel/Source/OS/Panic.c

@@ -21,7 +21,7 @@ static const ASCII* GetExceptionClassString(UInt32 class) {
 }
 
 __attribute__((noreturn)) static void Halt() {
-    while (1) {
+    loop {
         CPUDisableInterrupts();
         CPUWaitForInterrupt();
     }