Add https://github.com/qqqlab/qqqlab-RP2040-Toolbox (#6011)

Author: qqqlab

repositories.txt

@@ -7332,6 +7332,7 @@ https://github.com/braydenanderson2014/UnorderedMap
 https://github.com/qqqlab/madflight
 https://github.com/qqqlab/ESP32_SoftWire
 https://github.com/qqqlab/GPS-uBlox
+https://github.com/qqqlab/qqqlab-RP2040-Toolbox
 https://github.com/MJBeltran13/Bucopi_library
 https://github.com/lualtek/buttino-rak
 https://github.com/tomcombriat/FixMath