Add badges to README

Author: dereuromark

README.md

@@ -1,5 +1,10 @@
 # WP Djot
 
+[![CI](https://github.com/php-collective/wp-djot/actions/workflows/ci.yml/badge.svg)](https://github.com/php-collective/wp-djot/actions/workflows/ci.yml)
+[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](LICENSE)
+[![PHP 8.2+](https://img.shields.io/badge/PHP-8.2%2B-purple.svg)](https://php.net)
+[![WordPress 6.0+](https://img.shields.io/badge/WordPress-6.0%2B-blue.svg)](https://wordpress.org)
+
 A WordPress plugin for [Djot](https://djot.net/) markup language support. Convert Djot syntax to HTML in posts, pages, and comments.
 
 ## What is Djot?