fix: Correctly set source path

Stacktraces make much more sense this way

game/scene_loader.lua

@@ -291,7 +291,6 @@ end
 return function(scene_file_path)
   local content = readfile(scene_file_path)
   content = content .. "\nreturn END()"
-  local scene = load(content, nil, nil, SceneDSL())
-  -- TODO: return sensible error state if loading fails
+  local scene = load(content, scene_file_path, nil, SceneDSL())
   return scene()
 end