Add lint, format and type checks and basic tests. Update code style and fix CI. #19

	name: Code Quality

	on:
	push:
	branches: ["main"]
	pull_request:
	branches: ["*"]

	concurrency:
	group: ${{ github.workflow }}-${{ github.event.pull_request.number \|\| github.ref }}
	cancel-in-progress: true

	jobs:
	code-quality:
	name: Code Quality Checks
	runs-on: ubuntu-latest

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

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

	- name: Install dependencies
	run: npm install

	- name: Run Lint Checks
	run: \|
	echo "::group::Running Lint Checks"
	echo "Running ESLint..."
	npm run lint
	echo "✓ ESLint passed"
	echo ""
	echo "::endgroup::"

	- name: Run Format Checks
	run: \|
	echo "::group::Running Format Checks"
	npm run format:check
	echo "✓ Prettier passed"
	echo ""
	echo "::endgroup::"
	- name: Build project
	run: npm run build
	- name: Run Type Checks
	run: \|
	echo "::group::Running Type Checks"
	npm run type-check
	echo "✓ TypeScript passed"
	echo "::endgroup::"

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