feat: Integrate SiteAssist AI Assistant

[iam-rohid]

Closes #

✅ Checklist

• I have followed every step in the contributing guide (updated 2022-10-06).
• The PR title follows the convention we established conventional-commit
• I performed a functional test on my final commit

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Changelog

Added an AI Assistant built with SiteAssist.io to help visitors get answers ASAP.

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Screenshots

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Project	Deployment	Preview	Comments	Updated (UTC)
create-t3-app	Ready	Preview	Comment	Aug 18, 2025 8:36am

[iam-rohid]

If you need full ownership of the AI Assistant then let me know. I can transfer the Assistant to your organization on SiteAssist.io. And I'm open to give you a free pro plan for lifetime. t3 stack and @t3dotgg helped me a lot to build SiteAssist.io.