docs: small README improvements for branching #35

	name: CI

	on:
	push:
	branches:
	- dev
	pull_request:
	branches:
	- dev
	- master

	jobs:
	branch-policy:
	name: Enforce Branch Policy
	if: github.event_name == 'pull_request' && github.base_ref == 'master'
	runs-on: ubuntu-latest
	steps:
	- name: Require PR head branch to be dev
	run: \|
	if [ "${{ github.head_ref }}" != "dev" ]; then
	echo "Pull requests into master must come from dev."
	exit 1
	fi

	test:
	name: Run Tests
	runs-on: ubuntu-latest
	needs:
	- branch-policy
	if: always() && (needs.branch-policy.result == 'success' \|\| needs.branch-policy.result == 'skipped')
	steps:
	- name: Checkout
	uses: actions/checkout@v4

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: "3.12"
	cache: pip

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install -e .

	- name: Validate environment
	run: python -m pip check

	- name: Run tests
	run: pytest -q

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