💄 style(import): optimize import statement format

- merge separate imports from '@hono/zod-openapi' into a single import statement
- maintain same functionality while improving code style consistency

src/server/api/silver-users/knowledges/ranking.ts

@@ -1,5 +1,4 @@
-import { createRoute, OpenAPIHono } from '@hono/zod-openapi';
-import { z } from 'zod';
+import { createRoute, OpenAPIHono ,z } from '@hono/zod-openapi';
 import { ErrorSchema } from '@/server/utils/errorHandler';
 import { SilverKnowledgeService } from '@/server/modules/silver-users/silver-knowledge.service';
 import { AppDataSource } from '@/server/data-source';