Can generate the config without installing application through home-manager. Helpful when a package is broken (or not provided) on a specific platform through nixpkgs and needs to be installed through other means but you still can benefit from the declarative configuration.
The systemd user service depends on
config.xdg.configFile."hypr/hypridle.conf".source
for `X-Restart-Triggers`. When `cfg.settings` is the default `{}`,
this causes failure since
config.xdg.configFile."hypr/hypridle.conf".source
will not exist.
Making the addition conditional on `cfg.settings` actually having
content, which would mean `xdg.configFile."hypr/hypridle.conf"` does
exist, avoids the error.
