Add custom improvement proposal doc #541

	name: Markdown Linter
	# Lint runs the markdown linter over all markdown files in the docs repository.
	# This workflow is run on every pull request and push to main.
	# The linter will pass without running if no *.md files have been changed.
	on:
	pull_request:
	push:
	branches:
	- main

	jobs:
	markdown-lint:
	runs-on: ubuntu-latest
	timeout-minutes: 10
	steps:
	- uses: actions/checkout@v3
	- uses: nosborn/[email protected]
	with:
	files: .
	config_file: .markdownlint.yml
	# ignore_path: .markdownlintignore

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