docs: Make badges consistent, run markdownlint on all .md files #12

	name: PR Title Lint
	on: # yamllint disable-line rule:truthy
	pull_request:
	types:
	- opened
	- synchronize
	- reopened
	- edited
	merge_group:
	branches:
	- main
	types:
	- checks_requested
	permissions:
	contents: read
	jobs:
	commit-checks:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	with:
	fetch-depth: 0

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

	- name: Run commitlint on PR title
	env:
	PR_TITLE: ${{ github.event.pull_request.title }}
	# Echo from env variable to avoid bash errors with extra characters
	run: echo "$PR_TITLE" \| npx commitlint --verbose

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