add requirements.txt and link checker #1

	name: CI

	on: [push, pull_request]

	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: "3.12"
	cache: 'pip' # caching pip dependencies
	- name: Install dependencies
	run: \|
	pip install -r requirements.txt
	- name: Link Checker
	uses: lycheeverse/lychee-action@v1
	with:
	args: --base . --verbose --no-progress './.rst' './.ipynb'
	format: markdown
	output: /tmp/result.md
	fail: false

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