Create a Klipper plugin

[Jookia]

Using the emulator we should be able to start making a Klipper plugin. This should do the following:

• Allow sending and receiving JSON RPC
• Regularly ping the ACE and check its status
• Error if the status is invalid or dangerous

I'm not too sure what G-Code we need to implement at this point. Broadly we should support the following features:

• Drying filament
• Winding filament
• Feeding filament
• Feed assist

This needs to be integrated in to toolhead-specific macros to handle filament runout, cutting of the filament.

Things I don't know how to deal with yet:

• RFID
• Auto refill
• Mapping filament spools to slots manually

I also need to think hard about how to test all this. Testing would mostly be done using extrusion tests I think.

[systemik]

Many actions can be done via the MQTT broker of the printer (drying, change spool parameters ...).

More info for few of the actions (non exhaustive) here : https://github.com/systemik/Kobra3-Firmware/tree/main/mqtt

[Jookia]

To be clear, this isn't using the Kobra 3 firmware at all but instead directly talking to the ACE.