SASL-XOAUTH2 etc for Arch Linux

I recently found myself in need of reading and sending emails from an MS Outlook server.

To that end, I have packaged the sasl-xoauth2 (upstream, AUR package) tool for AUR, as well as have taken over maintenance of the orphaned python-msal (upstream, AUR package) library.

The actual setup for mbsync and postfix is quite involved, and will be documented in a separate post.