Meowburner, with ECAS and ERCF FS

This is a remix/mashup of the Meowburner and ERCF CW2 with ECAS and filament sensor.

Please see the original repo for BOM and assembly instructions (https://github.com/EtteGit/EnragedRabbitProject/tree/main/usermods/CW2_with_ECAS_and_optional_sensor)