feat: Refactor template handling and brand management

- Removed schema_json from article templates and related queries.
- Updated brand service to include website field in requests and responses.
- Simplified template wizard view by eliminating unused schema fields and related logic.
- Added tests for ark text format handling.
- Created migrations for dropping schema_json and adding website to brands.

server/internal/tenant/domain/brand.go

@@ -6,6 +6,7 @@ type Brand struct {
 	ID          int64
 	TenantID    int64
 	Name        string
+	Website     *string
 	Description *string
 	Status      string
 	CreatedAt   time.Time