Create Markdown reviewdog GitHub Actions workflow

> Run markdownlint with reviewdog [1] [2]

> markdownlint is a static analysis tool for Node.js [2]
> with a library of rules to enforce standards
> and consistency for Markdown files.
> It was inspired by - and heavily influenced by
> - Mark Harrison's markdownlint for Ruby. [3]
> The initial rules, rule documentation,
> and test cases came directly from that project.

[1]: https://github.com/reviewdog/action-markdownlint
[2]: https://github.com/DavidAnson/markdownlint
[3]: https://github.com/markdownlint/markdownlint

.github/workflows/markdown_tools.yaml

@@ -0,0 +1,29 @@
+name: Markdown tools
+on:
+ workflow_dispatch:
+
+concurrency:
+ group: ${{ github.workflow }}-${{ github.ref }}
+ cancel-in-progress: true
+
+jobs:
+ markdownlint:
+ name: MarkdownLint
+
+ permissions:
+ contents: read
+ pull-requests: read
+
+ runs-on: ubuntu-latest
+
+ steps:
+ - name: Checkout repo
+ uses: actions/checkout@v4
+ - name: Install Node
+ uses: actions/setup-node@v4
+ with:
+ node-version: 18
+ - name: Install MarkdownLint
+ run: npm install -g markdownlint-cli
+ - name: Checking markdown
+ run: markdownlint .