Add GHA for docs building #4

	name: Build documentation
	on: [push, pull_request]
	env:
	SPHINXOPTS: -W --keep-going

	jobs:
	build-docs:
	name: Build documentation
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	with:
	python-version: "3.12"
	- name: Install system dependencies
	run: sudo apt install -y doxygen
	- name: Install python dependencies
	run: pip install -r docs/requirements.txt
	- name: Build documentation
	run: make html -C docs SPHINXOPTS="$SPHINXOPTS"

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