Introduce `pyproject.toml` + pdm #272

	on: [push, pull_request]
	name: build-docs
	jobs:
	tests:
	runs-on: ubuntu-22.04
	name: Build docs
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: 3.12
	architecture: x64
	- name: Update tools
	run: pip install --upgrade pip setuptools wheel
	- name: Install sphinx
	run: pip install sphinx
	- name: Install package
	run: pip install -e .
	- name: Build docs
	run: cd docs && make html

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