feat: 重構本地搜索

feat: Algolia 搜索，點擊文章內容也會跳轉到相應頁面
fix: 修復 fullpage loading 顯示滾動條的 bug close #1235
fix: 修復 safari 下，搜索內容被系統搜索框遮擋的 bug
improvement: 手機 safari 橫屏時，網頁全屏幕顯示
improvement: 當沒有開啟 beautify 時， hr 顯示默認的樣式

layout/includes/additional-js.pug

@@ -59,3 +59,5 @@ div
 
   if theme.busuanzi.site_uv || theme.busuanzi.site_pv || theme.busuanzi.page_pv
     script(async data-pjax src= theme.asset.busuanzi || '//busuanzi.ibruce.info/busuanzi/2.3/busuanzi.pure.mini.js')
+
+  !=partial('includes/third-party/search/index', {}, {cache: true})

layout/includes/head.pug

@@ -15,7 +15,7 @@
 
 meta(charset='UTF-8')
 meta(http-equiv="X-UA-Compatible" content="IE=edge")
-meta(name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0")
+meta(name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0,viewport-fit=cover")
 title= tabTitle
 meta(name="author" content=pageAuthor)
 meta(name="copyright" content=pageCopyright)

layout/includes/head/config.pug

@@ -21,9 +21,12 @@
     localSearch = JSON.stringify({
       path: theme.local_search.CDN ? theme.local_search.CDN : config.root + config.search.path,
       preload: theme.local_search.preload,
+      top_n_per_article: theme.local_search.top_n_per_article,
+      unescape: theme.local_search.unescape,
       languages: {
         // search languages
         hits_empty: _p("search.local_search.hits_empty"),
+        hits_stats: _p("search.local_search.hits_stats"),
       }
     })
   }