UWSM is not usable if wayland-sessions are not linked. So
`services.displayManager.enable` should be true if UWSM is used.
`services.graphical-desktop.enable` is implied by
`services.displayManager.enable`.
See nixos/modules/services/misc/graphical-desktop.nix
Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>
[UWSM](https://github.com/Vladimir-csp/uwsm) is a session manager that wraps a wayland
window compositor with useful systemd units like `graphical-session-pre.target`,
`graphical-session.target`, `xdg-desktop-autostart.target`.
This is useful for Wayland Compositors that do not start
these units on these own.
Example for Hyprland:
```nix
programs.hyprland.enable = true;
programs.uwsm.enable = true;
programs.uwsm.waylandCompositors = {
hyprland = {
compositorPrettyName = "Hyprland";
compositorComment = "Hyprland compositor managed by UWSM";
compositorBinPath = "/run/current-system/sw/bin/Hyprland";
};
};
```
Co-authored-by: Kai Norman Clasen <k.clasen@protonmail.com>
