Docs: Change Icon Libraries

[JazzyMichael]

Documentation changes

This adds instructions on how to change icon libraries in docs.json

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I'm also interested in an open role for a Senior Frontend Engineer in SF, check out my Mintlify site here, I would love to set up an interview!

Tagging @dino475 & @ethanpalm based on the most recent changes from this PR 971

For Reviewers

When reviewing documentation PRs, please consider:

✅ Technical accuracy

• Code examples work as written
• Commands and configurations are correct
• Links resolve to the right destinations
• Prerequisites and requirements are accurate

✅ Clarity and completeness

• Instructions are clear and easy to follow
• Steps are in logical order
• Nothing important is missing
• Examples help illustrate the concepts

✅ User experience

• A new user could follow these docs successfully
• Common gotchas or edge cases are addressed
• Error messages or troubleshooting guidance is helpful

[ethanpalm]

Hey @JazzyMichael, thanks for opening a PR. We're not going to accept this contribution since the icons-required snippet just contains information for that specific property and not info about global icon library settings.

I encourage you to apply through the Senior Frontend Engineer job posting, if you haven't already.

Appreciate you taking the time to look through and contribute to the Mintlify docs 😄