add tests #1

	name: CI

	on:
	push:
	pull_request:
	types: [opened, synchronize, reopened]

	jobs:
	test:
	name: 🧪 Test
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

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

	- name: 📦 Install dependencies
	run: yarn install --frozen-lockfile

	- name: 🧪 Run tests
	run: yarn test:ci

	- name: 📊 Upload test results
	if: always()
	uses: actions/upload-artifact@v3
	with:
	name: test-results
	path: \|
	junit.xml
	coverage/

	lint:
	name: 🔍 Lint
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

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

	- name: 📦 Install dependencies
	run: yarn install --frozen-lockfile

	- name: 🔍 Run ESLint
	run: yarn lint

	- name: 💅 Check formatting
	run: yarn format:check

	typecheck:
	name: ʦ Type check
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

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

	- name: 📦 Install dependencies
	run: yarn install --frozen-lockfile

	- name: ʦ Type check
	run: yarn tsc --noEmit

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