refactor(widget): taxonomy widget (#763)

* Add link to navbar sections and refactor names

* Prevent duplicate tags and categories information

* Add style to the widget links

* refactor: add `taxonomy` widget

Replaces `categories` and `tag-cloud` widget.

* style: remove unused `font_size_{{ .Count }}` in `taxonomy` widget

---------

Co-authored-by: Jimmy Cai <hi@jimmycai.com>

layouts/partials/widget/archives.html

@@ -7,7 +7,9 @@
         <div class="widget-icon">
             {{ partial "helper/icon" "infinity" }}
         </div>
-        <h2 class="widget-title section-title">{{ T "widget.archives.title" }}</h2>
+        <h2 class="widget-title section-title">
+            <a class="widget-link" href="{{ $archivesPage.RelPermalink }}">{{ T "widget.archives.title" }}</a>
+        </h2>
 
         {{ $pages := where $context.Site.RegularPages "Type" "in" $context.Site.Params.mainSections }}
         {{ $archives := $pages.GroupByDate "2006" }}