docs: expand discovery FAQ and Magic Utilities comparison

[OnlineFix]

Summary

• Add 13 consistent search-focused FAQ answers to the website and README.
• Add a scoped Magic Utilities comparison and navigation links.
• Preserve unsigned-beta warnings, driver requirements and compatibility limits.
• Documentation only; no Reddit or third-party listing changes.

Verification

• 317 local unit tests passed.
• HTML nesting, IDs and local anchors validated.
• All FAQ answers match across both pages; git diff --check passed.