* Settings: add APIs for LIN configuration
Add getter/setter for LIN configuration:
- baudrate
- commander resistor ON/OFF
- mode (SLEEP, SLOW, NORMAL, FAST)
* Device: add LIN settings getter for devices with LIN
* LIN: add setup to LIN example
* LIN: settings minor tweaks from PR
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Co-authored-by: Francesco Valla <francesco.valla@mta.it>