implemented the deletion of unnecesarry details in not chosen objects, for the sake of memory efficiency in the history

src/music_kraken/cli/download/shell.py

@@ -167,7 +167,7 @@ class Shell:
         self.max_displayed_options = max_displayed_options
         self.option_digits: int = option_digits
         
-        self.current_results: Results = SearchResults
+        self.current_results: Results = None
         self._result_history: List[Results] = []
         
         self.genre = genre or get_genre()
@@ -296,6 +296,9 @@ class Shell:
         page: Type[Page]
         music_object: DatabaseObject
         
+        if self.current_results is not None:
+            self.current_results.delete_details(index)
+        
         try:
             page, music_object = self.current_results.get_music_object_by_index(index)
         except KeyError: