#### Description <!-- Please describe your use case, why you need this feature and why this feature is important for RIOT. --> I started to add support for the [Seeed Studio ESP32C3 Xiao](https://www.seeedstudio.com/Seeed-XIAO-ESP32C3-p-5431.html?qid=eyJjX3NlYXJjaF9xdWVyeSI6InhpYW8gZXNwMzJjMyIsImNfc2VhcmNoX3Jlc3VsdF9wb3MiOjQsImNfdG90YWxfcmVzdWx0cyI6ODcsImNfc2VhcmNoX3Jlc3VsdF90eXBlIjoiUHJvZHVjdCIsImNfc2VhcmNoX2ZpbHRlcnMiOiJzdG9yZUNvZGU6W3JldGFpbGVyXSJ9) board ### Useful links <!-- Please include links to any documentation that you think is useful. --> <!-- Thanks for contributing! -->