docs: update README to include reference to SKILL.md for AI integration

Author: AIPEAC

README.md

@@ -2,6 +2,8 @@
 
 A lightweight wrapper that adds `--ndrelease` (no-debug-release) support to `flutter build`.
 
+> 📖 **AI Skill file** See [`SKILL.md`](./SKILL.md) for fast AI intergration.
+
 ## What It Does
 
 `flutter build <target> --ndrelease` compiles your Flutter app in release mode with all `debugPrint(...)` and `print(...)` calls automatically stripped from the source.