Add group leader functionality and update group member management

- Create GroupLeader model and migration
- Alter GroupLeader member field to include related_name
- Implement is_leader and is_owner methods in Group model
- Update GroupDetailView to pass leader and owner status to template
- Refactor group buttons and members display into separate templates
- Add view and URL for setting group leaders
- Update permissions for adding/removing members and clearing blacklist
- Bump version to 0.1.1 in uv.lock

game/urls.py

@@ -41,6 +41,11 @@ urlpatterns = [
         views.GroupRemoveMemberView.as_view(),
         name="group_remove_member",
     ),
+    path(
+        "group/<int:pk>/set_leader/",
+        views.GroupSetLead.as_view(),
+        name="group_set_leader",
+    ),
     path(
         "group/<int:pk>/start_game/", views.GameCreateView.as_view(), name="start_game"
     ),