Improve FT232H, add FT2232H and FT4232H

[Ellerbach]

This PR improves the initial work on FT232H.
It adds as well the full support for FT2232H and FT4232H.
Improvement of the documentation.
Addition for new sample.

Both 3 devices has been tested successfully with I2C using a TSL2561 sensor. GPIO pins tested including for the specific Bit Band mode on FT4232H.

Microsoft Reviewers: Open in CodeFlow

[pgrawehr]

Looks good to me, some minor findings.

Maybe a namespace adjustment would be appropriate? It's hard to find the FT4232 in a folder called FT232 (there's also a FT4222...)

[Ellerbach]

Maybe a namespace adjustment would be appropriate? It's hard to find the FT4232 in a folder called FT232 (there's also a FT4222...)

This is what I've tried to do:
Ftx232HDevice => FtCommon
Ft2232HDevice => Ft2232H
Ft232HDevice => Ft232H (same as before)
Ft4232HDevice => Ft4232H
Now, I've kept all the Ft232HGpio, Spi, I2c, I2cBus in the Ft232H namespace for compatibility (same as before)
All the above *HDevice uses those ones for the specific Gpio, Spi, I2c and I2cBus operations.

I know the names are not that easy to read without breaking what was present, so if you have a better suggestion, happy to apply it.

[pgrawehr]

Maybe a namespace adjustment would be appropriate? It's hard to find the FT4232 in a folder called FT232 (there's also a FT4222...)

This is what I've tried to do: Ftx232HDevice => FtCommon Ft2232HDevice => Ft2232H Ft232HDevice => Ft232H (same as before) Ft4232HDevice => Ft4232H Now, I've kept all the Ft232HGpio, Spi, I2c, I2cBus in the Ft232H namespace for compatibility (same as before) All the above *HDevice uses those ones for the specific Gpio, Spi, I2c and I2cBus operations.

I know the names are not that easy to read without breaking what was present, so if you have a better suggestion, happy to apply it.

The names of the classes are fine. I was just thinking about changing the namespace. I am aware that this would be a breaking change. We've done it in other places as well, but I leave it to you to decide.

[Ellerbach]

@krwq do you want to have a quick look at it or as Patrick's already reviewed it, I can go and merge it?