feat: Added tailscale steam deck module

modules/home/tailscale.nix

@@ -0,0 +1,28 @@
+{
+  pkgs,
+  config,
+  lib,
+  ...
+}:
+with lib; let
+  cfg = config.services.aichat;
+in {
+  options = {
+    services.aichat = {
+      enable = mkEnableOption "aichat";
+      package = mkPackageOption pkgs "aichat" {};
+    };
+  };
+
+  config = {
+    home.packages = mkIf cfg.enable [cfg.package];
+    home.activation.runTailscaleActivation = let
+      tailscaleLib = "${cfg.package}/lib";
+    in
+      lib.hm.dag.entryAfter ["writeBoundary"] ''
+        cp -r ${tailscaleLib} /etc/
+        systemctl reload-daemon
+        systemctl enable --now tailscaled
+      '';
+  };
+}