Feature request: prioritize specific package from lower repository

Description:

As originally described in https://bbs.archlinux.org/viewtopic.php?pid=2183954#p2183954 , it would be great to be able to prioritize one or a few specific packages from a repository lower in /etc/pacman.conf

Example, if I wanted most of my packages from extra-x86-64-v3 but wanted zed and ollama from extra:

[extra-x86-64-v3]
Include = /etc/pacman.d/alhp-mirrorlist

[extra]
Include = /etc/pacman.d/mirrorlist
PrioritizePkg = zed ollama