Add GH Pages workflow #4

	name: documentation

	on: [push, pull_request, workflow_dispatch]

	permissions:
	contents: write

	jobs:
	docs:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	- name: Install dependencies
	run: \|
	python3.8 -m venv .venv
	.venv/bin/python -m pip install --upgrade pip
	.venv/bin/pip install -e ".[dev]"
	- uses: siacodelabs/setup-pandoc@v1
	- name: Sphinx build
	run: \|
	.venv/bin/sphinx-build -b html docs docs/_build
	- name: Deploy to GitHub Pages
	uses: peaceiris/actions-gh-pages@v3
	with:
	publish_branch: gh-pages
	github_token: ${{ secrets.GITHUB_TOKEN }}
	publish_dir: docs/_build/
	force_orphan: true

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