feat: 添加短链管理功能，包括创建、更新、删除和列表接口

src/routes/n5-link/modules/n5.services.ts

@@ -0,0 +1,7 @@
+import { desc, eq, count, or, like, and } from 'drizzle-orm';
+import { app, db, schema } from '@/app.ts';
+export class N5Service {
+  static async getBySlug(slug: string) {
+    return db.select().from(schema.shortLink).where(eq(schema.shortLink.slug, slug)).limit(1);
+  }
+}