Add qqqlab/ESP32_SoftWire (#4623)

Author: qqqlab

repositories.txt

@@ -6875,6 +6875,7 @@ https://github.com/braydenanderson2014/ArduinoTimer
 https://github.com/braydenanderson2014/SimpleProperties
 https://github.com/braydenanderson2014/UnorderedMap
 https://github.com/qqqlab/madflight
+https://github.com/qqqlab/ESP32_SoftWire
 https://github.com/MJBeltran13/Bucopi_library
 https://github.com/lualtek/buttino-rak
 https://github.com/tomcombriat/FixMath