Merge branch 'sim'

docs/badge/firmware-development.rst

docs/badge/programming.rst

python_payload/apps/appearance/__init__.py

python_payload/apps/graphics_mode/__init__.py

python_payload/apps/mandelbrot/__init__.py

python_payload/apps/w1f1/k3yboard.py

python_payload/apps/wurzelitzer/__init__.py

python_payload/st3m/application.py

python_payload/st3m/run.py

python_payload/st3m/ui/elements/overlays.py

python_payload/st3m/utils.py

sim/fakes/_sim.py

sim/fakes/audio.py

sim/fakes/bl00mbox.py

sim/fakes/ctx.py

sim/fakes/gzip.py

sim/fakes/leds.py

sim/fakes/machine.py

sim/fakes/media.py

sim/fakes/network.py