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Add a devenv setup and switch to pnpm #6

	name: CI

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

	jobs:
	test:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v5

	# The action reads the pnpm version from the packageManager field in package.json.
	- name: Install pnpm
	uses: pnpm/action-setup@v6

	- name: Use Node.js
	uses: actions/setup-node@v4
	with:
	node-version: "22"
	cache: "pnpm"

	- name: Install dependencies
	run: pnpm install --frozen-lockfile

	- name: Run lint
	run: pnpm run lint

	- name: Run build
	run: pnpm run build