Add publish extension, create actions files #1

	name: Install dependencies and build

	on:
	push:
	branches: actions
	pull_request:
	branches: '*'

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4
	- uses: ./.github/actions/setup
	- uses: ./.github/actions/test
	- uses: ./.github/actions/build-ext
	- uses: ./.github/actions/post-test

	- name: Package the extension
	run: \|
	set -eux

	pip install build
	python -m build
	pip uninstall -y "jupyterlab_reana" jupyterlab

	- name: Build sdist
	run: \|
	pip install build
	python -m build --sdist
	- name: Publish distribution to PyPI
	uses: pypa/gh-action-pypi-publish@release/v1
	with:
	skip_existing: true

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