Add story-related permissions to command module

This commit introduces three new permissions related to stories: can_post_stories, can_edit_stories, and can_delete_stories. These changes allow finer control over which users can interact with stories in the application.

app/commands/commands.py

@@ -85,6 +85,9 @@ def get(key: str) -> str | None:
         can_promote_members=False,
         can_change_info=False,
         can_invite_users=False,
+        can_post_stories=False,
+        can_edit_stories=False,
+        can_delete_stories=False,
         can_post_messages=True,
         can_edit_messages=True,
     )