Add FAQ entry for plugin selection guidance, closes #1280

[Rel1cx]

What kind of change does this PR introduce?

• Bugfix
• Feature
• Docs
• Test
• New Binding issue #___
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change?

• Yes, and the changes were approved in issue #___
• No

Checklist

• When resolving issues, they are referenced in the PR's title (e.g fix: remove a typo, closes #___, #___)
• I have added a convincing reason for adding this feature, if necessary

Other information

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Project	Deployment	Preview	Comments	Updated (UTC)
eslint-react	Canceled			Oct 15, 2025 3:02pm

[Copilot]

Pull Request Overview

This PR adds documentation to help users choose between the unified plugin and individual plugins by introducing a new FAQ entry and adding reference notes in the README files.

• Adds a new FAQ entry explaining when to use the unified plugin versus individual plugins
• Adds NOTE blocks in README files linking to the new FAQ entry
• Provides guidance based on user needs (preset usage, customization level, organizational config)

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
packages/plugins/eslint-plugin/README.md	Added NOTE block linking to FAQ for plugin selection guidance
apps/website/content/docs/faq.mdx	Added comprehensive FAQ entry explaining plugin selection criteria
README.md	Added NOTE block linking to FAQ for plugin selection guidance

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