feat: Add and configure greetd

modules/default.nix

@@ -6,5 +6,6 @@
     ./hyprland.nix
     ./shell.nix
     ./wayland.nix
+    ./greeter.nix
   ];
 }

modules/greeter.nix

@@ -0,0 +1,19 @@
+{ pkgs, ... }:
+{
+  services.gnome.gnome-keyring.enable = true;
+  security.pam.services.greetd.enableGnomeKeyring = true;
+
+  services.greetd = {
+    enable = true;
+    settings = {
+      initial_session = {
+          command = "Hyprland";
+          user = "rhea";
+        };
+      default_session = {
+        command = "${pkgs.greetd.tuigreet}/bin/tuigreet --time --cmd Hyprland";
+        user = "rhea";
+      };
+    };
+  };
+}