Tootfinder

Hooray @…, @… cherry-picked your @… patch to configure custom file renderers for compound extensions like .tar.gz! 🥳

feat: let markup renderers match on compound filename extensions like `.tar.gz`
### Needs and benefits At the moment I can configure something like ```ini [markup.zip] FILE_EXTENSIONS = .zip ``` but not ```ini [markup.tar] FILE_EXTENSIONS = .tar,.tar.gz,.tar.xz,.tar.bz2 ``` because only the very last extension (like `.gz`) is considered for matching. This ...