https://github.com/AlexKlimaj/LiPow-Firmware/pull/13

I have finally got the ST USB PD middleware basics working on the STM32G0. It reads in the capabilities from the source supply and can request the supply to change it's power profile.  I still need to implement algorithm to a select power profile from source based on connected battery type to provide highest efficiency for the bq25703a regulator.