docs: add reuse badge

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

README.md

@@ -3,6 +3,7 @@
   - SPDX-License-Identifier: GPL-3.0-or-later
 -->	
 # @nextcloud/typings
+[![REUSE status](https://api.reuse.software/badge/github.com/nextcloud-libraries/nextcloud-typings)](https://api.reuse.software/info/github.com/nextcloud-libraries/nextcloud-typings)
 [![NPM package](https://img.shields.io/npm/v/@nextcloud/typings?style=for-the-badge)](https://www.npmjs.com/package/@nextcloud/typings)
 [![License](https://img.shields.io/npm/l/@nextcloud/typings?color=green&style=for-the-badge)](https://github.com/nextcloud/nextcloud-typings/blob/master/LICENSE)
 [![Open issues](https://img.shields.io/github/issues-raw/nextcloud/nextcloud-typings?style=for-the-badge)](https://github.com/nextcloud/nextcloud-typings/issues)