feat: Adding RAG_FAQ.MD to retrieval-augmented-generation

[sermolin]

Description

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Fixes #<issue_number_goes_here> 🦕

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[holtskinner]

I added the spell checker, fix the identified errors

[github-actions[bot]]

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Unrecognized words (3)

chuncking Gemin roadmap

[holtskinner]

Closing this PR due to inactivity. Please re-open if changes are made.