improve contrib guide #2076

	name: tests

	on:
	push:
	branches: # Specifying branches makes it not run on pushed tags
	- "*"
	workflow_call: # Allow being ran from other actions
	# Enable when we start receiving PRs from forks
	# pull_request: # Run on PRs from forks (push doesn't cover those)

	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.8", "3.9", "3.10", "3.11"]
	steps:
	- name: Checkout
	uses: actions/checkout@v3

	- name: Bazel cache
	id: bazel-cache
	uses: actions/cache@v3
	with:
	path: ~/.cache/bazel
	key: ${{ runner.os }}-${{ matrix.python-version }}-bazel-cache-${{ hashFiles('**/BUILD', '.bazelrc', '.bazelversion', 'WORKSPACE') }}
	restore-keys: ${{ runner.os }}-${{ matrix.python-version }}-bazel-cache-

	- name: Install poetry
	run: pipx install poetry

	- name: Setup Python
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	cache: poetry

	- name: Install dependencies
	run: poetry install --no-interaction

	- name: Run tests
	run: poetry run bazel test //temporian/...:all //docs/...:all //tools/...:all --test_output=errors --compilation_mode=dbg
	# Note: Since mid-August 23, using "//...:all" incorrectly try to
	# compile the directory "build" created during the installation of one
	# of the dependency during "poetry install".

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