Added feature to upload all songs from a directory (optional recursive). Need to document the use of it as well as how to even use this CLI

include/Models/Song.h

@@ -15,7 +15,8 @@ namespace Models
         std::string genre;
         int year;
         int duration;
-        std::string  data;
+        int track;
+        std::string data;
         std::string songPath;
     };
 }