[core] Change package manager to pnpm #39372

	name: CI

	on:
	push:
	branches-ignore:
	# Renovate branches are always Pull Requests.
	# We don't need to run CI twice (push+pull_request)
	- 'renovate/**'
	pull_request:
	paths-ignore:
	# should sync with ci-check.yml as a workaround to bypass github checks
	- 'docs/**'
	- 'examples/**'

	permissions: {}

	jobs:
	# Tests dev-only scripts across all supported dev environments
	test-dev:
	# l10nbot does not affect dev scripts.
	if: ${{ github.actor != 'l10nbot' }}
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [macos-latest, windows-latest, ubuntu-latest]
	steps:
	- run: echo "${{ github.actor }}"
	- uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
	with:
	# fetch all tags which are required for `pnpm release:changelog`
	fetch-depth: 0
	- name: Set up pnpm
	uses: pnpm/action-setup@d882d12c64e032187b2edb46d3a0d003b7a43598 # v2.4.0
	- name: Use Node.js 18.x
	uses: actions/setup-node@5e21ff4d9bc1a8cf6de233a3057d20ec6b3fb69d # v3.8.1
	with:
	node-version: 18
	cache: 'pnpm' # https://github.com/actions/setup-node/blob/main/docs/advanced-usage.md#caching-packages-dependencies
	- run: pnpm install
	env:
	# Don't need playwright in this job
	PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
	- run: pnpm release:build
	# double run to check if cleanup works
	- run: pnpm release:build
	- run: pnpm release:changelog
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	- run: pnpm validate-declarations
	- name: pnpm release:tag
	run: \|
	git remote -v
	pnpm release:tag --dryRun

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