add gh

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: ngalaiko

flake.nix

@@ -59,11 +59,12 @@
                   tzdata
                   util-linux
                   curl
+                  gh
                   git
                   jq
+                  # browser tool: system chromium + the agent-browser CLI.
                   chromium
                   (import ./packages/agent-browser { inherit pkgs; })
-				  gh
                 ];
               };