add linters #1

	name: Lint README

	on:
	push:
	branches: [master]
	paths:
	- '**.md'
	- '.markdownlint.json'
	- '.github/workflows/lint.yml'
	- '.lychee.toml'
	pull_request:
	paths:
	- '**.md'
	- '.markdownlint.json'
	- '.github/workflows/lint.yml'
	- '.lychee.toml'

	jobs:
	markdownlint:
	name: Markdown style
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Run markdownlint
	uses: DavidAnson/markdownlint-cli2-action@v16
	with:
	globs: \|
	README.md
	Implementations.md

	style-checks:
	name: Custom style checks
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Check for trailing whitespace
	run: \|
	if grep -nE ' +$' README.md Implementations.md; then
	echo "::error::Trailing whitespace found"
	exit 1
	fi

	- name: Check for missing space after comma
	run: \|
	if grep -nE ',[A-Za-z0-9]' README.md Implementations.md; then
	echo "::error::Missing space after comma"
	exit 1
	fi

	- name: Check for double spaces (excluding indentation)
	run: \|
	if grep -nE '[^ ] +[^ ]' README.md Implementations.md; then
	echo "::error::Double space found inside a line"
	exit 1
	fi

	- name: Check for tab characters
	run: \|
	if grep -nP '\t' README.md Implementations.md; then
	echo "::error::Tab character found (use spaces)"
	exit 1
	fi

	link-check:
	name: Link check
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Run lychee link checker
	uses: lycheeverse/lychee-action@v2
	with:
	args: >-
	--no-progress
	--max-concurrency 8
	--timeout 30
	--retry-wait-time 5
	--max-retries 2
	--accept 200,206,403,429,999
	README.md Implementations.md
	fail: true

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