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

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

exampleSite/config/_default/params.toml

@@ -74,16 +74,20 @@ type = "archives"
 limit = 5
 
 [[widgets.homepage]]
-type = "categories"
+type = "taxonomy"
 
 [widgets.homepage.params]
 limit = 10
+type = "tags"
+icon = "tag"
 
 [[widgets.homepage]]
-type = "tag-cloud"
+type = "taxonomy"
 
 [widgets.homepage.params]
 limit = 10
+type = "categories"
+icon = "categories"
 
 [[widgets.page]]
 type = "toc"