add: system modules and options

system/modules/displayManager/greetd/default.nix

@@ -0,0 +1,26 @@
+{ pkgs, ... }:
+let
+  tuigreet = "${pkgs.greetd.tuigreet}/bin/tuigreet";
+in
+{
+  services.greetd = {
+    enable = true;
+    settings = {
+      default_session = {
+        command = "${tuigreet} --time --remember --cmd Hyprland";
+        user = "greeter";
+      };
+    };
+  };
+
+  systemd.services.greetd.serviceConfig = {
+    Type = "idle";
+    StandardInput = "tty";
+    StandardOutput = "tty";
+    StandardError = "journal"; # Without this errors will spam on screen
+    # Without these bootlogs will spam on screen
+    TTYReset = true;
+    TTYVHangup = true;
+    TTYVTDisallocate = true;
+  };
+}