airfield: fix build

Airfield suffered from loose version constraints which
caused severe version (and API) conflicts between its dependencies
and transitive ones.

Furthermore the `npm2nix` packaging is deprecated and needed to be
replaced by `node2nix`.

see #31032

pkgs/tools/networking/airfield/deps.json

@@ -0,0 +1,8 @@
+[ { "express": "3.0.5" }
+, { "swig": "0.14.0" }
+, { "consolidate": "0.10.0" }
+, "redis"
+, "connect-redis"
+, "async"
+, "request"
+]