Feiyu bootloader begins

After many traps for young players, the Feiyu began running a custom bootloader. Key points were converting the GPIOs from JTAG, changing a bunch of HAL code . Once complete, there will be no need for the Nordic board or all the wires. The trick is going to be daisychaining all 3 boards & fitting everything in flash. It may seem pointless to reconstitute such a low end chip, but it is what made the Feiyu the small size it is. The mane problem is all this is for just 1 copy of 1 product that was only made for 3 months.