feat: add featured posts grid and update blog terminology

- Introduced a new FeaturedPostsGrid component to display featured posts on the homepage.
- Updated the Home component to fetch and render featured posts from the WordPress API.
- Changed instances of "بلاگ" to "دانشنامه" across various components for consistent terminology.

lib/wp-api.ts

@@ -71,6 +71,9 @@ export interface GetPostsOptions {
   perPage?: number;
   search?: string;
   categoryId?: number;
+  /** ترتیب بر اساس: date, modified, title, ... در وردپرس. برای اولویت دستی (menu_order) پلاگین/فیلتر در وردپرس لازم است. */
+  orderby?: string;
+  order?: "asc" | "desc";
 }
 
 async function fetchWithTimeout(
@@ -96,12 +99,14 @@ async function fetchWithTimeout(
 export async function getPosts(
   options: GetPostsOptions = {}
 ): Promise<GetPostsResult> {
-  const { page = 1, perPage = 9, search, categoryId } = options;
+  const { page = 1, perPage = 9, search, categoryId, orderby, order } = options;
   const params = new URLSearchParams();
   params.set("page", String(page));
   params.set("per_page", String(perPage));
   if (search?.trim()) params.set("search", search.trim());
   if (categoryId) params.set("categories", String(categoryId));
+  if (orderby) params.set("orderby", orderby);
+  if (order) params.set("order", order);
   params.set("_embed", "1");
 
   const url = `${WP_API_BASE}/posts?${params.toString()}`;