[feat] Memory manager

include/memory/heap.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include <efi.h>
+
+void  init_heap();
+void* kmalloc(UINTN size);
+void  kfree(void* ptr);
+void* kcalloc(UINTN num, UINTN size);
+void* krealloc(void* ptr, UINTN new_size);