Smartfan v6 Support

[sberkovitz]

This PR adds support for Sequent Systems Smart Fan v6, along with support for Raspi OS Bookworm on a 4B.

The v6 Smart Fan uses a different GPIO pin from previous generations, and also lacks the capabilities drop from v4 onward. As I don't have an older device to test with, I opted to create a new module for this generation instead of sharing the existing one. This new module only contains the capabilities of the v4 and onward, and supports the changed GPIO pin in v6 (?). Some other general fixes as well.

Raspberry Pi Bookworm changes how GPIO pins are addressed. Per @rstrouse in rstrouse#61 (comment)

I have found why your GPIO numbers seem so strange. The pi engineers are now identifying gpios by touple which includes the chip id (2) in the gpio. Honestly, this is the same approach as other boards such as the orange pi and probably what raspberry should have been doing all along. Perhaps there is a future for multiple gpio headers on the same board. For now the problem is that the pi 5 does not have the gpio chip embedded (chip id 0). It is external to the cpu on chip id (2).

To address this, I have included a new pinout profile that I have tested with the Raspberry 4B. I am almost certain the 5 will need a different pinout, but unsure of other 4 variants and earlier.