Panic and interrupts

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

src/arch/x86_64/isr.c

@@ -0,0 +1,16 @@
+#include <arch/isr.h>
+#include <arch/panic.h>
+
+void isr_general(void*){
+	_panic("Unhandled interrupt");
+	asm("hlt");
+}
+
+void isr_except(void*){
+	_panic("CPU Exception");
+	asm("hlt;");
+}
+
+void isr_pagefault(void*){
+
+}