fix(search): 添加搜索页面路由和内容

site/content/search/_index.md

@@ -0,0 +1,11 @@
+---
+title: "搜索"
+date: 2026-03-15T00:00:00+08:00
+draft: false
+menu:
+  main:
+    - name: Search
+      weight: 50
+---
+
+搜索全站文章和标签

site/hugo.yaml

@@ -34,3 +34,6 @@ menu:
     - name: Resume
       pageRef: /resume
       weight: 40
+    - name: Search
+      pageRef: /search
+      weight: 50