Adding support for the enraged rabbit carrot feeder (ERCF)

[droftarts]

@Inlinebrother I asked @pfn on the RRF Discord server (https://discord.gg/uS97Qs7) if he was still using it. His reply:

I haven't updated it to latest and whatnot, it did kinda work before
I don't have a filament sensor in the toolhead, it's entirely driven by the ercf encoder
so because of the way filament monitors work on rrf, if you have a can-fd toolboard, you need to run the filament monitor from the ercf to the toolboard

Ian

[AlexKid]

@Inlinebrother
I'm working on it with an Duet2 Ethernet and RRF.
For startingpoint I used https://github.com/pfn/EnragedRabbitOnRRF.
Assambly is already finished, loading and unloading is working.
First testprint still waiting for time unfortunataly.

[AlexKid]

@Inlinebrother printing and filament change is working. Struggling with the servo, sometimes it will not engage completely. Will try to provide 6V instead of 5V power this should result in ~500g more force. If you are still interested in this topic you can contact me.