Add submission # 6603

#6603

Author: ArduinoBot

registry.txt

@@ -8216,3 +8216,4 @@ https://github.com/styropyr0/Wizer.git|Contributed|Wizer
 https://github.com/scalpelspace/scalpelspace_momentum.git|Contributed|ScalpelSpace Momentum
 https://github.com/bull-m/BULLM_ExtendMotor.git|Contributed|BULLM_ExtendMotor
 https://github.com/boby15000/Tempo.git|Contributed|Tempo
+https://github.com/X-croot/XCR-LDR.git|Contributed|XCR-LDR