add deprecated note to library.properties and README

Author: leonardocavagnis

README.md

@@ -1,4 +1,10 @@
-# Portenta Machine Control Library for Arduino
+# [Deprecated] Portenta Machine Control Library for Arduino
+
+> ⚠️ **Warning**: This library is deprecated and no longer actively maintained.
+
+> We recommend transitioning to the [Arduino_PortentaMachineControl](https://github.com/arduino-libraries/Arduino_PortentaMachineControl) library for ongoing support, new features and contributions.
+
+> Please note that the [examples](./examples/) provided with this library are not compatible with the new library.
 
 [![Check Arduino status](https://github.com/arduino-libraries/Arduino_MachineControl/actions/workflows/check-arduino.yml/badge.svg)](https://github.com/arduino-libraries/Arduino_MachineControl/actions/workflows/check-arduino.yml)
 [![Compile Examples status](https://github.com/arduino-libraries/Arduino_MachineControl/actions/workflows/compile-examples.yml/badge.svg)](https://github.com/arduino-libraries/Arduino_MachineControl/actions/workflows/compile-examples.yml)

library.properties

@@ -2,8 +2,8 @@ name=Arduino_MachineControl
 version=1.1.1
 author=Arduino
 maintainer=Arduino <[email protected]>
-sentence=Arduino Library for Portenta Machine Control - PMC
-paragraph=
+sentence=DEPRECATED. Arduino Library for Portenta Machine Control - PMC
+paragraph=This library is no longer actively maintained and is deprecated. Consider migrating to <a href="https://github.com/arduino-libraries/Arduino_PortentaMachineControl">Arduino_PortentaMachineControl</a> library.
 category=Communication
 url=https://github.com/arduino-libraries/Arduino_MachineControl
 architectures=mbed, mbed_portenta