feat: implement address deferencing

src/vm/fzl_vm_debug.c

@@ -20,6 +20,10 @@ void fzl_vm_print_ops(fzl_vm_t *vm)
 
     switch (vm->ops[i])
     {
+      case FZL_OPCODE_DEREFERENCE:
+        printf("DEREFERENCE\n");
+        break;
+
       case FZL_OPCODE_CMP_EQ_STR:
         printf("CMP_EQ_STR\n");
         break;