Installing systemd-resolved by default is still probably not a good
idea (e.g. until #1430 is fixed, at least?), but this adds config for
NM and sd-resolved to get the stub resolver set up automatically when
systemd-resolved is installed manually by a user.
Part-of: https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/6250
[ci:skip-build]: already built successfully in CI
Clayton Craft
7a9acf86ec