Add websockets Python package to faf development environment

- Add websockets dependency to Python environment in flake.nix
- Required for WebSocket connections to Firefox tabs

scripts/f-around-firefox/flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1769740369,
+        "narHash": "sha256-xKPyJoMoXfXpDM5DFDZDsi9PHArf2k5BJjvReYXoFpM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "6308c3b21396534d8aaeac46179c14c439a89b8a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

scripts/f-around-firefox/flake.nix

@@ -11,6 +11,7 @@
       pkgs = import nixpkgs { inherit system; };
       pythonEnv = pkgs.python3.withPackages (ps: with ps; [
         lz4
+        websockets
       ]);
     in
     {