docs: shared `pytket-docs-theming` submodule #143

	name: check docs build

	on:
	pull_request:
	branches:
	- main
	schedule:
	# 03:00 every Saturday morning
	- cron: '0 3 * * 6'

	jobs:
	check:
	name: check docs build
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@v4
	with:
	submodules: true
	fetch-depth: '0'
	- run: git fetch --depth=1 origin +refs/tags/:refs/tags/ +refs/heads/:refs/remotes/origin/
	- name: Set up Python 3.11
	uses: actions/setup-python@v5
	with:
	python-version: 3.11
	- name: install python requirements for docs
	run: \|
	python -m pip install poetry
	poetry install
	- name: install graphviz
	run: \|
	sudo apt-get update
	sudo apt-get install graphviz
	- name: build manual and examples
	run: \|
	poetry run ./build-docs.sh

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