feat: 移除 katex copy-tex.css

feat: CDN可配置 cdnjs
feat: cdn可設置 version 和 custom format
feat: 點擊歸檔日期跳轉到頁面，標題顯示日期而不是‘歸檔’二字 closed #925
fix: Algolia搜索沒有結果 closed #923

layout/includes/header/index.pug

@@ -19,7 +19,7 @@ if !theme.disable_top_img && page.top_img !== false
   if top_img !== false
     - var imgSource = top_img && top_img.indexOf('/') !== -1 ? `background-image: url('${url_for(top_img)}')` : `background: ${top_img}`
     - var bg_img = top_img ? imgSource : ''
-    - var site_title = is_archive() ? fragment_cache('findArchivesTitle', function(){return findArchivesTitle(theme.menu);}) : page.title || page.tag || page.category || config.title
+    - var site_title = is_archive() ? findArchivesTitle(page, theme.menu, date) : page.title || page.tag || page.category || config.title
     - var isHomeClass = is_home() ? 'full_page' : 'not-home-page'
     - is_post() ? isHomeClass = 'post-bg' : isHomeClass
   else

layout/includes/third-party/math/katex.pug

@@ -1,6 +1,5 @@
 link(rel="stylesheet" type="text/css" href=url_for(theme.asset.katex))
 script(src=url_for(theme.asset.katex_copytex))
-link(rel="stylesheet" type="text/css" href=url_for(theme.asset.katex_copytex_css))
 script.
   (() => {
     document.querySelectorAll('#article-container span.katex-display').forEach(item => {