Feature request: Add new stuff from dmbutyugin's advanced-features branch

[Ataraxia-Mechanica]

https://github.com/dmbutyugin/klipper/commits/advanced-features/
Currently bleeding-edge-v2 is a bit old and doesn't support changing PA during printing (master branch of danger klipper has a commit that reverted the change that made printer stutter while changing PA so it isn't affected). There's also a commit that made disabling smoothing extruder base position optional. Bunch of cool stuff in it really.

[Ataraxia-Mechanica]

Actually no, I am getting reproducible Internal error on command G1 with it :(

[Ataraxia-Mechanica]

By only adding the allow dynamic PA commit to BEv2 I haven't encountered any error for a few hours of print time, so I think it can be added.

[rogerlz]

Thanks for testing what works and what doesn't. Indeed, there are a few changes in the mainline that make advanced features incompatible with dk bleeding-edge-v2. I will look into the dynamic pa commit.