basic fork foo, function itself is empty

kernel/syscall/skeleton.h

@@ -1,4 +1,5 @@
 #pragma once
+#include "arch/idt.h"
 
 #include "types.h"
 #include "../memory/pagetable.h"
@@ -29,7 +30,7 @@ void invlpg(uintptr_t virt_addr);
 bool send(Vault &vault, int pid, const void* sbuffer, size_t ssize, void* rbuffer, size_t rsize);
 int receive(Vault &vault, void* buffer, size_t size);
 bool reply(Vault &vaul, const void* buffer, size_t size);
-//int fork(Vault &vault, InterruptContext *user);
+int fork(Vault &vault, InterruptContext *user);
 
 
 }  // namespace Skeleton