refactor: change project structure

include/utils/hash_utils.h

@@ -0,0 +1,16 @@
+#ifndef CWS_HASH_UTILS_H
+#define CWS_HASH_UTILS_H
+
+unsigned int my_str_hash_fn(const void *key);
+
+bool my_str_equal_fn(const void *a, const void *b);
+
+void my_str_free_fn(void *value);
+
+unsigned int my_int_hash_fn(const void *key);
+
+bool my_int_equal_fn(const void *a, const void *b);
+
+void my_int_free_key_fn(void *key);
+
+#endif