Provide external devices and extensions to Openblock.
Please visit the wiki: https://wiki.openblock.cc/ to learn how to write extensions.
Notice that offical attributes can only be officially marked by the community, please do not add the offical attribute to the extension of pr.
All extensions marked as offical will be included in the official translation maintenance list, do not modify the translation file content of these files directly. You should apply to join the OpenBlock team on transifex to translate these content: https://www.transifex.com/openblockcc/public/