Add HackerGadgets NVMe HAT

[geerlingguy]

HackerGadgets / Vileer described an NVME Hat for Raspberry Pi 5 on Twitter, which would be the first such card with a cutout specifically for the fan position in the Pi case (many people have asked 'what about ventilation so you don't block the fan from hitting the SoC below!):

There was also an earlier prototype which included PoE power supply—but it was showing low voltage warnings due to using PoE instead of PoE+ power.

[geerlingguy]

It is on the site: https://pipci.jeffgeerling.com/hats/hackergadgets-nvme-hat.html