New belt tighteners ++

I got a few hours in today as well.

Today I focused on belt tighteners, since I now have room for them, after the rework I did yesterday. They are inspired by what I recalled about the tighteners for the Voron V0 Nema14 stepper motors since I liked that solution.

I also did other smaller fixes after the resizing of the printer, and I’m happy with the progress I’ve had lately.