Move common host features to features-nixos folder

features-nixos/optional/authentication.nix

@@ -0,0 +1,29 @@
+{
+  pkgs,
+  lib,
+  ...
+}: {
+  # Make programs like nextcloud client access saved passwords
+  services.gnome.gnome-keyring.enable = true;
+
+  programs.seahorse.enable = true;
+  programs.ssh.askPassword = lib.mkForce "${pkgs.seahorse}/libexec/seahorse/ssh-askpass"; # Solve conflicting definition in seahorse and plasma6
+
+  # Make authentication work for e.g. gparted
+  security.polkit.enable = true;
+  systemd = {
+    user.services.polkit-gnome-authentication-agent-1 = {
+      description = "polkit-gnome-authentication-agent-1";
+      wantedBy = ["graphical-session.target"];
+      wants = ["graphical-session.target"];
+      after = ["graphical-session.target"];
+      serviceConfig = {
+        Type = "simple";
+        ExecStart = "${pkgs.polkit_gnome}/libexec/polkit-gnome-authentication-agent-1";
+        Restart = "on-failure";
+        RestartSec = 1;
+        TimeoutStopSec = 10;
+      };
+    };
+  };
+}