Add fast train icon to indicate which trains are fast or not. #42

	name: Build
	on: [push]
	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	path: main
	- name: Checkout MicroPython
	uses: actions/checkout@v4
	with:
	repository: micropython/micropython
	ref: refs/tags/v1.21.0
	path: micropython
	- name: Install build tools
	run: \|
	sudo apt-get update
	sudo apt-get install -y cmake gcc-arm-none-eabi \
	libnewlib-arm-none-eabi build-essential
	- name: Build Cross-compiler
	run: \|
	pushd micropython
	make -C mpy-cross
	popd
	- name: Get MicroPython submodules
	run: \|
	pushd micropython
	make -C ports/rp2 BOARD=RPI_PICO_W submodules
	popd
	- name: Build MicroPython with manifest.
	run: \|
	pushd micropython
	cd ports/rp2
	make -j 4 BOARD=RPI_PICO_W FROZEN_MANIFEST=../../../../main/manifest.py
	popd
	- name: Rename UF2
	run: \|
	pushd micropython
	mv ports/rp2/build-RPI_PICO_W/firmware.uf2 \
	ports/rp2/build-RPI_PICO_W/pico_train_display.uf2
	popd
	- name: Upload Artifact
	uses: actions/upload-artifact@v3
	with:
	name: pico_train_display
	path: micropython/ports/rp2/build-RPI_PICO_W/pico_train_display.uf2
	- name: Release
	uses: softprops/action-gh-release@v1
	if: startsWith(github.ref, 'refs/tags/')
	with:
	files: micropython/ports/rp2/build-RPI_PICO_W/pico_train_display.uf2

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