Add todo

src/json_entities/json_entities.c

@@ -4,6 +4,10 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+// TODO (Abdelrahman): Because print_json and free_json are recursive functions,
+// they seem to cause stack overflow when dealing with large files. Refactor
+// both of them to avoid this problem.
+
 void print_json(const jentity_t *entity, u32 indent) {
   PERSISTENT i32 indentation = 0;