PocketBeagle2: Add Python examples

• Shifting to having Python as the default language for examples.
• The repository will still host examples in multi language, just with Python being the priority and everything else being a best effort kind of situation.
• To that effect, do not use Rust workspaces.
• The following structure will be followed for each example: {example_name}/{language}/* This is because some examples will have a single file while others require more complex organization.
• I have structured the libraries in such a way that we can add dynamic pinmux in future for the pins.
• The library closely follows RPI: https://gpiozero.readthedocs.io/en/latest/

cc @lorforlinux @jkridner

Signed-off-by: Ayush Singh ayush@beagleboard.org