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chore: add Prettier formatting with eslint-config-prettier integration #24

	name: PR validation

	on:
	pull_request:
	workflow_dispatch:

	permissions:
	contents: read

	jobs:
	quality:
	name: ESLint
	runs-on: ubuntu-latest

	steps:
	- name: Check out repository
	uses: actions/checkout@v4

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

	- name: Install dependencies
	run: npm ci

	- name: Build
	run: npm run build

	- name: Format check
	run: npm run format

	- name: Lint
	run: npm run lint

	tests:
	name: Tests (Node ${{ matrix.node-version }})
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	node-version: ["20", "22", "24"]

	steps:
	- name: Check out repository
	uses: actions/checkout@v4

	- name: Set up Node.js
	uses: actions/setup-node@v4
	with:
	node-version: ${{ matrix.node-version }}

	- name: Install dependencies
	run: npm ci

	- name: Build
	run: npm run build

	- name: Run tests
	run: npm test