[api] Simple JSON encoding for strings, UTF-8 rather than Unicode

src/json_encode.h

@@ -0,0 +1,14 @@
+#ifndef JSON_ENCODE_H
+#define JSON_ENCODE_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "collections.h"
+#include "string_utils.h"
+#include "utf8proc/utf8proc.h"
+
+char *json_encode_string(char *str);
+
+#endif