ci: add docs optional deps #3

	name: Build and publish docs

	on:
	workflow_dispatch:
	push:
	branches:
	- main

	# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
	permissions:
	contents: read
	pages: write
	id-token: write

	# Allow only one concurrent deployment, skipping runs queued between the run
	# in-progress and latest queued.
	concurrency:
	group: "pages"
	cancel-in-progress: true

	jobs:
	build:
	name: Build docs.
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python '3.10'
	uses: actions/setup-python@v5
	with:
	python-version: '3.10'
	cache: "pip"
	- name: Install Protoc
	uses: arduino/setup-protoc@v2
	- name: Install Tierkreis
	run: pip install '.[typecheck,docs]'
	- name: Build docs
	run: \|
	cd docs
	./build.sh
	- name: Upload artifact.
	uses: actions/upload-pages-artifact@v3
	with:
	path: ./docs/build/

	publish:
	name: Publish docs.
	environment:
	name: github-pages
	url: ${{ steps.deployment.outputs.page_url }}
	runs-on: ubuntu-latest
	needs: build
	steps:
	- name: Setup Pages
	uses: actions/configure-pages@v5
	- name: Deploy to GitHub Pages.
	id: deployment
	uses: actions/deploy-pages@v4

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