[RESOLVED] Model Predictive Control Support (MPCTEMP)

[thisiskeithb]

As requested on Twitter, I've added Model Predictive Control Support (MPCTEMP) support. When enabled, this replaces PID for the hotend.

When configured correctly, this gives better responsiveness and stability than PID:

Enable with PRUSA_AIO_HOTEND_MPCTEMP and autotune with M306 T. Add the tuned values to Prusa_AIO_Configuration.h by enabling PRUSA_AIO_CUSTOM_HOTEND_MPCTEMP.