Use individual GHA workflows to run tests (`pytest`) and check code format (`black`) #5

	# GitHub Actions workflow that runs tests.
	# Reference: https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions
	name: Run tests

	on:
	pull_request: { branches: [ main ] }
	push: { branches: [ main ] }
	workflow_dispatch: { }

	jobs:
	test:
	name: Run tests
	runs-on: ubuntu-latest
	steps:
	- name: Check out commit # Docs: https://github.com/actions/checkout
	uses: actions/checkout@v4
	- name: Set up Python # Docs: https://github.com/actions/setup-python
	uses: actions/setup-python@v5
	with:
	# Specify a Python version that satisfies the `tool.poetry.dependencies.python`
	# version requirement specified in `pyproject.toml`.
	python-version: '3.9'
	- name: Install Poetry # Docs: https://github.com/snok/install-poetry
	uses: snok/install-poetry@v1
	- name: Install dependencies # Docs: https://python-poetry.org/docs/cli/#install
	run: poetry install --no-interaction
	- name: Run tests
	run: \|
	# For debug: Dump color information to the console.
	poetry run python -m rich.color
	# Run the tests.
	poetry run pytest -vv --color=yes

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