Raspberry Pi HQ Camera RAW Support

It'd be great to see Darktable support the new Raspberry Pi HQ camera's hybrid JPEG/RAW format. For the first time Raspberry included an interchangeable C/CS mount, and the Sony IMX477 is a significant step-up compared to their previous cameras. Darktable already does a great job with the converted DNG from PyDNG - which converts the RAW embedded in the somewhat unique hybrid JPEG/RAW captured by raspistill and picamera (note that picamera's documentation about the bayer data doesn't include info pertinent to the IMX477). While the PyDng -> Darktable workflow is quite solid, it would be awesome if Darktable could directly use the hybrid JPEG/RAW file.

I've uploaded both the original hybrid JPEG/RAW and a resulting DNG that was converted via PyDNG to https://raw.pixls.us, and will also be creating a noise profile / feature request later tonight based on the converted PyDNG files. Let me know if you need any further photos or details. Thanks!

X-Ref: https://github.com/darktable-org/darktable/issues/6998 https://github.com/schoolpost/PyDNG/issues/30 https://github.com/waveform80/picamera/issues/657 https://github.com/raspberrypi/documentation/issues/1741
X-Ref: https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=291913