chore: add is pinned to the blog entity and also add route for it

src/modules/blogs/providers/blogs.service.ts

@@ -262,4 +262,16 @@ export class BlogsService {
     const blogs = await this.blogsRepository.getMostVisitedBlogs();
     return { blogs };
   }
+
+  async getPinnedBlogs() {
+    const blogs = await this.blogsRepository.getPinnedBlogs();
+    return { blogs };
+  }
+
+  async togglePinnedStatus(id: string) {
+    const blog = await this.findBlogById(id);
+    blog.isPinned = !blog.isPinned;
+    await this.blogsRepository.save(blog);
+    return { message: CommonMessage.UPDATE_SUCCESS, blog };
+  }
 }