feat: extract tuigreet and workstation modules

modules/nixos/tuigreet.nix

@@ -0,0 +1,39 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+let
+  cfg = config.tuigreet;
+in
+{
+  options = {
+    tuigreet = {
+      enable = lib.mkEnableOption "greetd with tuigreet";
+
+      command = lib.mkOption {
+        type = lib.types.str;
+        description = "Session command to launch";
+      };
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    services.greetd = {
+      enable = true;
+      useTextGreeter = true;
+      settings = {
+        default_session = {
+          command = builtins.toString (
+            pkgs.writeShellScript "tuigreet-session" ''
+              ${pkgs.util-linux}/bin/setterm --blank 1 --powersave powerdown --powerdown 1
+              exec ${pkgs.tuigreet}/bin/tuigreet --time --remember --cmd ${cfg.command}
+            ''
+          );
+          user = "greeter";
+        };
+      };
+    };
+  };
+}

modules/nixos/workstation.nix

@@ -0,0 +1,32 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+let
+  cfg = config.workstation;
+in
+{
+  options = {
+    workstation = {
+      enable = lib.mkEnableOption "workstation utilities";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    virtualisation.docker = {
+      enable = true;
+      logDriver = "json-file";
+    };
+
+    services.tailscale = {
+      enable = true;
+      useRoutingFeatures = "both";
+    };
+
+    environment.systemPackages = with pkgs; [
+      smartmontools
+    ];
+  };
+}