add M5Module-LLM lib (#5300)

Author: Gitshaoxiang

repositories.txt

@@ -3857,6 +3857,7 @@ https://github.com/m5stack/STAMP-PICO
 https://github.com/m5stack/TimerCam-arduino
 https://github.com/m5stack/M5-SX127x
 https://github.com/m5stack/M5Unit-8Encoder
+https://github.com/m5stack/M5Module-LLM
 https://github.com/machinefi/psa-crypto-arduino
 https://github.com/machinefi/w3bstream-client-arduino-ce
 https://github.com/MacroYau/LTC2942-Arduino-Library