Update README.md

Author: imliubo

README.md

@@ -1,3 +1,13 @@
+# 🚫 Deprecated — Use M5GFX & M5Unified
+
+- **M5GFX**  
+  High-performance, lightweight graphics and display driver library for M5 devices.  
+  <https://github.com/m5stack/M5GFX>
+
+- **M5Unified**  
+  Unified base library for M5 devices (IO/peripherals, power management, audio, etc.).  
+  <https://github.com/m5stack/M5Unified>
+
 # M5Core2 Library
 
 [![Arduino Compile](https://github.com/m5stack/M5Core2/actions/workflows/arduino-action-compile.yml/badge.svg)](https://github.com/m5stack/M5Core2/actions/workflows/arduino-action-compile.yml)