Feat can commander

[askuric]

I have seem to forgotten to make a PR for this!

This PR implements the CANCommander compatible with SimpleFOC.

• It implements the RegisterIO for that (src/comms/can/CANCommander.cpp).
• It adds a possibility to add custom registers (its a try, maybe not the best way but it definitely works :D)
• I've added a list of registers in markdown for easier navigation for users.
• Some examples in the examples folder.
• It is intended to be used with pysimplefoc python package.

For now it will work on stm32, esp32 and teensy. The low-level cross platform part is implemented within SimpleFOCio library.

It does work but its still in the early stage I'd say. It needs a bit of community improvements and testing.

[runger1101001]

This is so awesome...

I'll merge this and then fix the build checks - since these examples need the CAN library also they're not compiling right now...