feat: add brand library management features

- Introduced BrandLibrarySummary type to encapsulate brand library limits and usage.
- Updated Brand interface to include keyword_count and question_count fields.
- Implemented brand library limits in the backend, including max brands, keywords, and questions per keyword.
- Added API endpoint to retrieve brand library summary.
- Enhanced BrandsView.vue to display brand library usage and limits.
- Implemented computed properties to manage brand, keyword, and question limits in the UI.
- Updated mutation handlers to invalidate relevant queries upon creating/updating brands, keywords, and questions.
- Added visual indicators for brand, keyword, and question limits in the UI.
- Enhanced error handling for exceeding brand and keyword limits during creation.

packages/shared-types/src/index.ts

@@ -725,6 +725,8 @@ export interface Brand {
   website: string | null;
   description: string | null;
   status: string;
+  keyword_count: number;
+  question_count: number;
   created_at: string;
   updated_at?: string;
 }
@@ -759,6 +761,18 @@ export interface Question {
   created_at: string;
 }
 
+export interface BrandLibrarySummary {
+  plan_code: string;
+  plan_name: string;
+  max_brands: number;
+  used_brands: number;
+  remaining_brands: number;
+  max_keywords: number;
+  used_keywords: number;
+  remaining_keywords: number;
+  max_questions_per_keyword: number;
+}
+
 export interface CompetitorRequest {
   name: string;
   website?: string | null;