feat: add coding packages module (bruno, insomnia)

home/coding/default.nix

@@ -1,10 +1,11 @@
 # Coding environment aggregator — profile-independent development tooling.
-# Imports editors, LSP servers, git configuration, and the agent system.
+# Imports editors, LSP servers, git configuration, the agent system, and optional packages.
 {...}: {
   imports = [
     ./editor
     ./lsp
     ./git/git.nix
     ./agents/agents.nix
+    ./packages.nix
   ];
 }

home/coding/packages.nix

@@ -0,0 +1,20 @@
+# Additional coding packages — API clients and GUI development tools.
+# Opt-in since not all coding hosts need these desktop-oriented tools.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.coding.packages;
+in {
+  options.coding.packages.enable = mkEnableOption "additional coding packages (bruno, insomnia)";
+
+  config = mkIf cfg.enable {
+    home.packages = [
+      pkgs.bruno
+      pkgs.insomnia
+    ];
+  };
+}