feat: add group name functionality to models

- Introduced a new `group_name` field in the model configuration to allow for custom provider-group display names.
- Updated the `CursorModelCards`, `CursorModelEditor`, and `CursorSettingsPage` components to support group settings.
- Enhanced the UI to include group settings options, allowing users to modify group names and associated configurations.
- Added localization strings for new group settings features in both English and Chinese.
- Implemented a database migration to add the `group_name` column to the model configurations.

server/tests/compaction.rs

@@ -27,6 +27,7 @@ async fn summarize_replaces_model_history_and_preserves_cursor_history() {
         .create_model(&ModelConfigInput {
             sort_order: 0,
             display_name: "Test Model".into(),
+            group_name: None,
             model_type: ModelType::OpenAi,
             base_url: "https://example.com/v1/chat/completions".into(),
             use_full_url: true,