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/transport/router.go

@@ -30,7 +30,6 @@ func RegisterRoutes(app *bootstrap.App) {
 	tplHandler := NewTemplateHandler(app)
 	templates.GET("", tplHandler.List)
 	templates.GET("/:id", tplHandler.Detail)
-	templates.GET("/:id/schema", tplHandler.Schema)
 	templates.POST("/:id/drafts", tplHandler.SaveDraft)
 	templates.POST("/:id/analyze-tasks", tplHandler.CreateAnalyzeTask)
 	templates.GET("/:id/analyze_task_result", tplHandler.GetAnalyzeTaskResult)