Get OctoPrint working with the MK4 for remote control and camera

[geerlingguy]

Highly related: #9

Prusa, I'm sure, would love for me to use PrusaLink / Prusa Connect, and I may try them out... but I love me some OctoPrint, and there's a guide: Octoprint setup on MK4/ MK3.9 / MK3.5 / XL.

So I would like to minimally get OctoPrint working with the MK4, and mount up a Pi Camera Module 3 on the side somewhere permanent, along with a Pi 4 or Pi 5.

I'm aware there may be a few issues with print speed... I would like to do some testing and see if those concerns are well-founded. Supposedly the USB serial connection maxes out at 115200 baud or something. It'd be nice to not have a print get bogged down in serial comms!

If all else fails, I would at least like to get a Pi Camera Module 3 wired up and connected to PrusaLink (which runs local on the printer). It'd be super cool if OctoPrint could be like Klipper where you kinda just jam it into the MK4 for a complete printer takeover :D