K1 Extruder Adapter

WARNING. The solution needs revision. While executing CX_NOZZLE_CLEAN, the head hits the cable channel on the back wall. Therefore, it is necessary to either disable the cleaning of the nozzle, or raise the fastening of the cable channel. It's draft model, not fully tested! Just as proof of concept. The main purpose is to place the filament sensor between the extruder and the nozzle. It is required for the correct operation of the ERCF.