Use yarn and small fixes #1

	name: Check - Yarn and dependencies

	on:
	pull_request:
	paths:
	- ".github/actions/yarn-project-setup/**"
	- ".github/workflows/check-yarn.yaml"
	- "package.json"
	- "yarn.lock"
	workflow_call:
	workflow_dispatch:

	jobs:
	duplicate-dependencies:
	name: Check for duplicate dependencies
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
	- name: Setup yarn tools
	uses: ./.github/actions/yarn-project-setup
	- name: Check for duplicate dependencies
	run: yarn run check:yarn:dedupe

	yarn-install-errors:
	name: Validate Yarn install does not contain errors
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
	- name: Setup project
	uses: ./.github/actions/yarn-project-setup
	- name: Yarn install output check
	run: \|
	errors=$(yarn install --json \| jq 'select(.displayName != "YN0000")')
	error_count=$(echo "$errors" \| jq -s 'length')
	if [ "$error_count" -gt 0 ]; then
	echo "Detected Yarn install errors: $error_count"
	echo -e "$errors"
	exit 1
	fi

	peer-requirements:
	name: Validate yarn peer requirements
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
	- name: Setup project
	uses: ./.github/actions/yarn-project-setup
	- name: Validate peer requirements are defined
	run: \|
	reqs=$(yarn explain peer-requirements)
	echo "$reqs" \| grep '✘' \|\| true
	echo "$reqs" \| grep -q '✘' && exit 1 \|\| exit 0

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