Add docsify-dashboard plugin (#312)

Author: erectbranch

README.md

@@ -277,6 +277,7 @@ A curated list of awesome things related to [docsify](https://docsify.js.org)
 - [docsify-fontsize](https://github.com/SDU-Little-River/docsify-fontsize) - A docsify plugin allow users to customize the font size.
 - [docsify-shiki](https://github.com/simochee/docsify-shiki) - Replace syntax highlighting with Shiki.
 - [docsify-image-slider](https://github.com/erectbranch/docsify-image-slider) - A docsify plugin to create a slider from images.
+- [docsify-dashboard](https://github.com/erectbranch/docsify-dashboard) - A docsify plugin to create a dashboard from a JSON file.
 
 ## Themes