feat(home/pi): add agent-browser package

Assisted-by: openai-codex (gpt-5.6-luna)

home/gabriel/features/ai/pi/packages/agent-browser.nix

@@ -0,0 +1,6 @@
+{pkgs, ...}: {
+  # Install skill
+  programs.pi-coding-agent.settings.packages = [pkgs.agent-browser];
+  # Make CLI available globally on the user
+  home.packages = [pkgs.agent-browser];
+}

home/gabriel/features/ai/pi/packages/default.nix

@@ -4,6 +4,7 @@
     ./pi-codex-image-gen.nix
     ./pi-invisible-continue.nix
     ./pi-mcp.nix
+    ./agent-browser.nix
     ./rpiv-ask-user-question.nix
   ];
 }