[Request] millennium

### Package https://aur.archlinux.org/pkgbase/millennium ### Purpose Millennium is a modding framework for the Steam client allowing the use of custom themes and plugins. It was requested before but was rejected because of a old python dependency. That dependency has since been removed from the package. ### License MIT ### Submission checklist - [x] The package is not banned. - [x] The package is not available in Chaotic AUR or official Arch repos. - [x] The package has not already been requested.