Add GitHub Actions workflows for CI/CD #6

	name: CI

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	jobs:
	test:
	name: Test
	runs-on: ubuntu-latest
	permissions:
	contents: read

	strategy:
	matrix:
	node-version: [18, 20]

	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Setup Node.js ${{ matrix.node-version }}
	uses: actions/setup-node@v4
	with:
	node-version: ${{ matrix.node-version }}
	cache: 'npm'

	- name: Install dependencies
	run: npm ci

	- name: Run tests
	run: npm test

	- name: Upload coverage
	if: matrix.node-version == '20'
	uses: codecov/codecov-action@v4
	with:
	files: ./coverage/lcov.info
	fail_ci_if_error: false

	lint:
	name: Lint
	runs-on: ubuntu-latest
	permissions:
	contents: read

	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Setup Node.js
	uses: actions/setup-node@v4
	with:
	node-version: 20
	cache: 'npm'

	- name: Install dependencies
	run: npm ci

	- name: Run linter
	run: npm run lint

	build:
	name: Build
	runs-on: ubuntu-latest
	permissions:
	contents: read

	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Setup Node.js
	uses: actions/setup-node@v4
	with:
	node-version: 20
	cache: 'npm'

	- name: Install dependencies
	run: npm ci

	- name: Build
	run: npm run build

	- name: Check for uncommitted changes
	run: \|
	if ! git diff --exit-code; then
	echo "Error: Build produced changes that are not committed"
	echo "Please run 'npm run build' and commit the changes"
	exit 1
	fi

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