Add DMFLib-Arduino to registry

Author: marcoratto

repositories.txt

@@ -8595,3 +8595,4 @@ https://github.com/juano2310/SuperCANBus
 https://github.com/stm32duino/X-NUCLEO-IHM04A1
 https://github.com/versianih/hdw-utils
 https://github.com/asimzulfiqar/esp_cron
+https://github.com/marcoratto/DMFLib-Arduino