Add submission # 6530

#6530

Author: ArduinoBot

registry.txt

@@ -8273,3 +8273,5 @@ https://github.com/k-off/A4988.git|Contributed|A4988
 https://github.com/tyeth/omron-devhub_d6t-arduino.git|Contributed|OmronD6T - Community Fork
 https://github.com/RacoonX65/LightweightIoT-Arduino-Lib.git|Contributed|LightweightIoT
 https://github.com/deeja/BTHomeV2-Arduino.git|Contributed|BTHomeV2-Arduino
+https://github.com/dejwk/roo_quantity.git|Contributed|roo_quantity
+https://github.com/dejwk/roo_threads.git|Contributed|roo_threads