Add reuse status badge

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

README.md

@@ -5,6 +5,7 @@
 
 # Vue components
 
+[![REUSE status](https://api.reuse.software/badge/github.com/nextcloud-libraries/nextcloud-vue)](https://api.reuse.software/info/github.com/nextcloud-libraries/nextcloud-vue)
 [![npm last version](https://img.shields.io/npm/v/@nextcloud/vue.svg?style=flat-square)](https://www.npmjs.com/package/@nextcloud/vue)
 [![Dependabot status](https://img.shields.io/badge/Dependabot-enabled-brightgreen.svg?longCache=true&style=flat-square&logo=dependabot)](https://dependabot.com)