Use separate IST stack for IRQs and cpu exceptions

kernel/amd64/bootmain.c

@@ -1,6 +1,7 @@
 #include <amd64/apic.h>
 #include <amd64/hpet.h>
 #include <amd64/init.h>
+#include <amd64/debug.h>
 #include <aux/compiler.h>
 #include <limine/limine.h>
 #include <mm/liballoc.h>
@@ -16,6 +17,7 @@ ALIGNED (16) static uint8_t uacpi_memory_buffer[UACPI_MEMORY_BUFFER_MAX];
 
 void bootmain (void) {
   amd64_init ();
+  amd64_debug_init ();
   pmm_init ();
   mm_init ();