feat(models): add models configuration page with provider management and token usage

- Replace "Task Center" with "Models" in sidebar and routing
- Add new models configuration page with AI provider account management
- Implement token usage history with filtering, grouping, and visualization
- Create provider store with Pinia for state management
- Add internationalization support for models feature
- Include development analysis documentation for feature implementation

src/i18n/constants.ts

@@ -19,5 +19,6 @@ export const NAMESPACES = [
   'rate',
   'knowledge',
   'component',
+  'models',
 ] as const;
 export type Namespace = (typeof NAMESPACES)[number];