superseded: [RFC cluster/docs/manager/proxmox{,-perl-rs,-widget-toolkit} 00/15] fix #7238: Add XOAUTH2 authentication support for SMTP notification targets

[Arthur Bied-Charreton]

Superseded-by: 
https://lore.proxmox.com/pve-devel/20260213160415.609868-1-a.bied-charre...@proxmox.com/T/#t