Init Chroma and LLamaIndex Multi-Modal Demo (#8897)

* Init Chroma and LLamaIndex Multi-Modal Demo

* cr

* Create fleet_libraries_context.md (#8849)

* cr

* cr

* linting

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Co-authored-by: haotian zhang <haotianzhang@haotians-MacBook-Pro-3.local>
Co-authored-by: Andrew Zhou <44193474+adrwz@users.noreply.github.com>
Co-authored-by: Logan <logan.markewich@live.com>