feat(misc): embeddings script and list sources in ai response

[mandarini]

Open this PR in favor of this: #18029

• New tools library that has the embeddings script.
• Github workflow that calls the new library
• Show a list of sources from the articles that were used.

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Name	Status	Preview	Comments	Updated (UTC)
nx-dev	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 3, 2023 3:29pm

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