add deprecation readme

turtle-example/README.md

@@ -1,2 +1,18 @@
-# turtle
+# turtle-example
+
+**⚠️ LEGACY PACKAGE - Bevy-based implementation**
+
+This package contains the original Bevy-based turtle implementation.
+
+**For current development, see [turtle-lib-macroquad](../turtle-lib-macroquad/).**  
+**See the [main README](../README.md) for the active project.**
+
+## Status
+
+This package is no longer actively developed. The project has moved to a Macroquad + Lyon architecture for:
+- Faster compilation times
+- Simpler codebase
+- Better rendering quality
+
+Examples here are kept for reference only.