Replaced some out of stock parts according to this google doc: https://docs.google.com/document/d/1eLLpFlSNDrbDvGdHOI949uXwQ5axULItsFLGIyRNisI/edit?usp=sharing
Updated the symbol and footprint libraries to KiCad 6 format.
Fixed some schematic ERC errors that show up in KiCad 6.
Fixed I2C connector pinouts
Updated the mounting hole, now they all have copper pads on top and bottom and they are connected to GND
A few fixes on layout due to unwanted changes caused by KiCad 6 (for example some bug of the fill zones of the VOUTx nets)
Updated the BOM, i2cMap, Gerber files, etc.