Add GH Action for commit message validation. #4

	# Copyright (c) 2024, Zededa, Inc.
	# SPDX-License-Identifier: Apache-2.0
	---
	name: Lint Commit Messages

	on: # yamllint disable-line rule:truthy
	push:
	branches:
	- "master"
	- "[0-9]+.[0-9]+"
	- "[0-9]+.[0-9]+-stable"
	pull_request:
	branches:
	- "master"
	- "[0-9]+.[0-9]+"
	- "[0-9]+.[0-9]+-stable"

	jobs:
	commitlint:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	with:
	ref: ${{ github.base_ref }}
	fetch-depth: 0

	- name: Fetch the PR's head ref
	run: \|
	git fetch origin ${{ github.event.pull_request.head.sha }}:${{ github.event.pull_request.head.ref }}
	git checkout ${{ github.event.pull_request.head.ref }}

	- name: Set up Node.js
	uses: actions/setup-node@v3
	with:
	node-version: '21'

	- name: Install Commitlint
	run: npm install @commitlint/config-conventional @commitlint/cli

	- name: Run Commitlint
	run: npx commitlint --from=origin/master --to=HEAD --config .commitlintrc.yml

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