rename to `Adafruit_CircuitPython_NAU7802`

[dhalbert]

If we are going to maintain this, it should be renamed to Adafruit_CircuitPython_NAU7802.

[dhalbert]

There are also still mentions of cedargrove in the README and maybe elsewhere.

[CedarGroveStudios]

There are also still mentions of cedargrove in the README and maybe elsewhere.

Yes, including Learn Guides.