Import and modernize bocoup/test262-regexp-generator #2

	name: Tools

	jobs:
	lint:
	name: Lint tests
	on:
	push
	# FIXME: only on push: main
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.x'
	cache: pip
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r tools/lint/requirements.txt
	- name: Test the lint tool
	run: ./tools/lint/test/run.py
	- name: Lint all tests
	run: ./tools/scripts/ci_lint.sh

	lint_new:
	name: Lint new or changed tests
	on:
	pull_request
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.x'
	cache: pip
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r tools/lint/requirements.txt
	- name: Test the lint tool
	run: ./tools/lint/test/run.py
	- name: Identify new or changed tests
	id: changed_tests
	uses: tj-actions/changed-files@v45
	with:
	files: test/
	- name: Lint new or changed tests
	if: steps.changed_tests.outputs.any_changed == 'true'
	env:
	CHANGED: ${{ steps.changed_tests.outputs.all_changed_files }}
	run: \|
	echo New or modified test files:
	echo "$CHANGED"
	./tools/scripts/ci_lint.sh "$CHANGED"

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