Add CONTRIBUTING.md to README.md #289

	# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
	# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions

	name: Python tests (all optional dependencies)

	on: ["push"]

	jobs:
	build:

	runs-on: windows-latest
	strategy:
	matrix:
	python-version: ['3.8', '3.9', '3.10', '3.11']
	env:
	MPLBACKEND: Agg # https://github.com/orgs/community/discussions/26434
	SDL_VIDEODRIVER: "dummy" # for PyGame render https://stackoverflow.com/questions/15933493/pygame-error-no-available-video-device
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v1
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	git submodule update --init --recursive
	python -m pip install --upgrade pip
	pip install .[all,dev]
	- name: Setup java for ENHSP
	uses: actions/setup-java@v2
	with:
	distribution: "microsoft"
	java-version: "17"
	- name: Download and install ENHSP
	run: \|
	git clone https://gitlab.com/enricos83/ENHSP-Public.git
	cd ENHSP-Public; git checkout enhsp20-0.9.7; bash ./compile; cd ..
	bash -c "mkdir .planners; mv ENHSP-Public/enhsp-dist .planners/enhsp-20; rm -rf ENHSP-Public"
	- name: Test with pytest
	run: \|
	pytest tests

Provide feedback