Panic and interrupts

Added a basic kernel panic function and interrupt support for x86_64 (mostly for exception handling)

src/arch/x86_64/panic.c

@@ -0,0 +1,14 @@
+#include <arch/panic.h>
+#include <stdio.h>
+
+__attribute((noreturn)) void _panic(char* reason){
+	
+	// TODO stack trace and register print
+	
+	printf("Kernel panic.\nWhy: %s\nWhere: TODO\nWho: TODO\n", reason);
+
+	while(1){
+		asm("cli;hlt;");
+	}
+
+}