docs: prettier format markdown documents

[MikeMcC399]

Situation

• Top-level Markdown documents in this repo are checked with the script check:markdown for hyperlink errors. There is however no check for consistent formatting implemented, leaving Markdown source formatting inconsistencies in the documents.

• Prettier's support for Markdown is available and unused.

Change

To ensure consistent Markdown document source formatting as part of an overall effort to increase linting coverage in the repo:

• Add a script format:markdown to fix all formatting of Markdown documents with Prettier

• Add a script format:markdown:check to check all Markdown documents with Prettier for use in CI

• Add .prettierignore with an exception for LICENSE.md since this file is essentially sourced externally and should not be automatically re-formatted.

• Add instructions to CONTRIBUTING to format Markdown documents

• Add format:markdown:check to the .github/workflows/check-markdown.yml workflow.

• Correct all formatting of Markdown documents.

Verification

Local

• Ubuntu 22.04.2 LTS
• Windows 11 24H2

Node.js 22.14.0 LTS

Execute

npm ci
npm run format:markdown:check
npm run format:markdown

CI

Run .github/workflows/check-markdown.yml

[cypress-app-bot]

• Create a Draft Pull Request if your PR is not ready for review. Mark the PR as Ready for Review when you're ready for a Cypress team member to review the PR.

[MikeMcC399]

rebased and resolved conflicts in package.json

[github-actions]

🎉 This PR is included in version 6.7.14 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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