Update highscores_data to be an overarching class for all data.

data/category.py

@@ -111,6 +111,12 @@ class Category:
             sorted(self._scores_map.items(), key=lambda x: x[1].value, reverse=not self.ascending)
         )
 
+    def clear(self) -> None:
+        """
+        Clears all Scores tracked in score map. This is a test function and shouldn't really be used.
+        """
+        self._scores_map.clear()
+
     def get_user_score(self, user: str) -> Score:
         """
         Gets a user's score. Returns None if user is not found.