docs: add /* eslint-env node */ on top of suggested configs

[JoshuaKGoldberg]

PR Checklist

• Addresses an existing open issue: fixes Getting Started guide causes ESLint complaints in .eslintrc.(c)js #6825
• That issue was marked as accepting prs
• Steps in Contributing were taken

Overview

For each module.exports = in a .mdx file in a code block that includes most or all of a config file, adds the /* eslint-env node */ comment.

[typescript-eslint]

Thanks for the PR, @JoshuaKGoldberg!

typescript-eslint is a 100% community driven project, and we are incredibly grateful that you are contributing to that community.

The core maintainers work on this in their personal time, so please understand that it may not be possible for them to review your work immediately.

Thanks again!

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• Node 18 - nx run-many --target=build --parallel --exclude website
• Node 18 - nx test type-utils
• Node 18 - nx test scope-manager
• Node 18 - nx test typescript-estree
• Node 18 - nx test utils
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• Node 14 - nx run-many --target=build --parallel --exclude website
• Node 18 - nx test eslint-plugin-tslint
• nx run-many --target=typecheck --parallel
• Node 18 - nx test eslint-plugin
• Node 18 - nx test eslint-plugin-internal
• Node 14 - nx test visitor-keys --coverage=false
• Node 18 - nx test ast-spec
• Node 14 - nx test type-utils --coverage=false
• Node 14 - nx test utils --coverage=false
• Node 14 - nx test eslint-plugin-tslint --coverage=false
• Node 14 - nx test ast-spec --coverage=false
• nx run-many --target=lint --parallel
• nx run-many --target=build --parallel --exclude website
• Node 14 - nx test typescript-estree --coverage=false
• Node 14 - nx test eslint-plugin-internal --coverage=false
• Node 14 - nx test eslint-plugin --coverage=false
• Node 14 - nx test parser --coverage=false

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