New world and player files format

src/files/files.h

@@ -5,6 +5,10 @@
 #include <filesystem>
 #include "../typedefs.h"
 
+namespace json {
+    class JObject;
+}
+
 namespace files {
     extern bool write_bytes(std::filesystem::path, const char* data, size_t size);
     extern uint append_bytes(std::filesystem::path, const char* data, size_t size);
@@ -12,6 +16,7 @@ namespace files {
     extern char* read_bytes(std::filesystem::path, size_t& length);
     extern std::string read_string(std::filesystem::path filename);
     extern bool write_string(std::filesystem::path filename, const std::string content);
+    extern json::JObject* read_json(std::filesystem::path file);
 }
 
 #endif /* FILES_FILES_H_ */