feat(opencode): also expose formatters on PATH

Re-add home.packages so nixfmt, prettier, shfmt, ruff, taplo and stylua
are available for interactive use, alongside the store-path-pinned
references in the generated config.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

modules/home/cli-apps/opencode/default.nix

@@ -107,6 +107,16 @@ in
   };
 
   config = mkIf cfg.enable {
+    # Also expose the formatters on PATH for interactive use.
+    home.packages = [
+      pkgs.nixfmt-rfc-style
+      pkgs.nodePackages.prettier
+      pkgs.shfmt
+      pkgs.ruff
+      pkgs.taplo
+      pkgs.stylua
+    ];
+
     # The agents/, commands/ and other files come from the repo dir; config.json
     # is generated from opencodeConfig above so formatter paths stay pinned.
     xdg.configFile."opencode" = {