feat: add opencode-desktop package with Wayland support

pkgs/opencode-desktop/default.nix

@@ -0,0 +1,23 @@
+{ lib, stdenv, symlinkJoin, makeWrapper, inputs ? null, }:
+let
+  opencode-desktop =
+    inputs.opencode.packages.${stdenv.hostPlatform.system}.desktop;
+in symlinkJoin {
+  name = "opencode-desktop";
+  paths = [ opencode-desktop ];
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  postBuild = ''
+    wrapProgram $out/bin/opencode-desktop \
+      --run 'if [[ "$NIXOS_OZONE_WL" == "1" ]]; then export OC_ALLOW_WAYLAND=1; fi'
+  '';
+
+  meta = {
+    description = "OpenCode Desktop App with Wayland support";
+    homepage = "https://opencode.ai";
+    license = lib.licenses.mit;
+    platforms = lib.platforms.linux;
+    mainProgram = "opencode-desktop";
+  };
+}