PID M-codes

[IhorNehrutsa]

Intellistep GM-codes do not match any of the found variants

https://reprap.org/wiki/G-code M130: Set PID P value M131: Set PID I value M132: Set PID D value M132 in MakerBot M133: Set PID I limit value M134: Write PID values to EEPROM M135: Set PID sample interval M136: Print PID settings to host

https://marlinfw.org/docs/gcode/M304.html M303 - PID autotune M304 - Set Bed PID

[CAP1Sup]

I picked out codes for commands not found in Marlin. If you want to change them to more established commands, I think that would be best. Open a PR, it shouldn't be too hard to modify the parser for whatever commands and parameters you would like. The parser is very flexible and easy to work with

[CAP1Sup]

This should be complete now. I used the more universal M301 instead of M130s

[CAP1Sup]

@IhorNehrutsa have you had a chance to test out the commands?