Added new github action to retrieve the PR associated with the branch… #1

	name: Get PR Number
	description: Get PR number for merge queues and squash merges
	branding:
	icon: package
	color: blue

	inputs:
	token:
	description: Specify token (GH or PAT), instead of inheriting one from the calling workflow
	default: ${{ github.token }}

	outputs:
	pr:
	description: "Associated pull request number"
	value: ${{ steps.vars.outputs.pr }}

	runs:
	using: composite
	steps:
	- id: vars
	shell: bash
	run: \|
	# Get PR number based on the event type
	if [ "${{ github.event_name }}" == 'pull_request' ]; then
	echo "Event type: pull request"
	pr=${{ github.event.number }}
	elif [ "${{ github.event_name }}" == 'merge_group' ]; then
	echo "Event type: merge queue"
	pr=$(echo ${{ github.event.merge_group.head_ref }} \| grep -Eo "queue/main/pr-[0-9]+" \| cut -d '-' -f2)
	elif [ "${{ github.event_name }}" == 'push' ]; then
	echo "Event type: push"
	pr=$(\
	curl -sL -H "Accept: application/vnd.github+json" -H "Authorization: Bearer ${{ inputs.token }}" \
	-H "X-GitHub-Api-Version: 2022-11-28" \
	https://api.github.com/repos/${{ github.repository }}/commits/${{ github.sha }}/pulls \
	\| jq 'map(select(.base.ref == "release/${{ github.ref_name }}")) \| .[0].number'
	)
	if [ -z "${pr}" ]; then
	echo "No PR number found. Was this push triggered by a squashed PR merge?"
	pr=""
	fi
	else
	echo "Event type: unknown or unexpected"
	pr=""
	fi

	# Validate PR number
	if [[ ! "${pr}" =~ ^[0-9]+$ ]]; then
	echo "PR number format incorrect: ${pr}"
	exit 1
	fi

	# Output PR number
	echo "Summary ---"
	echo -e "\tPR: ${pr}"
	echo "pr=${pr}" >> $GITHUB_OUTPUT

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