feat(gh): add gh-copilot

horsch/github.nix

@@ -1,11 +1,21 @@
-{ ... }:
+{ pkgs, lib, ... }:
 
 {
-  programs.gh = {
+  nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
+   "gh-copilot"
+  ];
+
+  programs = {
+    gh = {
       enable = true;
 
       settings = {
         git_protocol = "ssh";
       };
+
+      extensions = with pkgs; [
+        gh-copilot
+      ];
+    };
   };
 }