Port WARDuino to the Zephyr RTOS

[MaartenS11]

This PR contains a work in progress port of WARDuino to the Zephyr RTOS, Zephyr makes it relatively easy to compile to various different boards such as the Open Bot Brain board which uses an STM32L496ZG. Adding support for other boards can be done by simply creating a config file which contains some board specific properties.

Currently on the the following primitives are supported:

• chip_delay
• chip_pin_mode
• chip_digital_write
• chip_digital_read
• print_int

Open Bot Brain specific (Some currently just for testing purposes)

• motor_test
• drive_motor_for_ms
• drive_motor_degrees

Demo showing drive_motor_degrees which uses the encoder in the motor to be accurate to 1 degree:

https://github.com/TOPLLab/WARDuino/assets/15368970/3fbfdd45-b388-4ae9-a51f-c4e189dbb284

[MaartenS11]

Closing this PR in favor of #241.