Papis now installed through pipx instead of pacman - reason being that
it allows me to inject plugins only found on github (papis-tui) and also
install my own plugin while they do not exist on the AUR.
Split the lists into two, with testing getting automatically updated on
packages added (and removed, but only if the package to be removed is
*not* in stable packages already).
This way, I can always be sure that I have my stable setup in the
repository, but packages that I am temporarily testing have a place
without being forgotten and I can more easily change them around until
they find a place in stable or get thrown out.
