Provide JSON files with extension information that work for specific or all TYPO3 versions
Examples:
fileadmin/ter/extensions.json
=> All extensions
fileadmin/ter/extensions.v9.json
=> All extensions working with TYPO3 v9
fileadmin/ter/extensions.v10.json
=> All extensions working with TYPO3 v10
Additionally add a json-file.md5
file for fast check if file has changed