[E&A] Drafts initial conceptual docs for EIS

[szabosteve]

Overview

Related to https://github.com/elastic/search-docs-team/issues/245

This PR adds the initial conceptual documentation about EIS to the E&A/Elastic Inference section.

Preview

EIS

[leemthompo]

Just a few ideas about this overview, LMKWYT :)

[maxjakob]

Thank you for starting this 🙏 I left a bunch of suggestions.

Generally, I would suggest a slightly different structure to not break the flow of Inference API-related info:

• Intro
• AI features powered by EIS
• Available task types
• Default EIS endpoints
  • Examples (as sub-heading as this uses the default endpoint)
• Regions

Of course these are all just suggestions :)

Also note that I'm not 100% sure we want to encourage Inference API usage at all. We should share this with Shubha soon.

[maxjakob]

Looks good 👍 We just need to clarify if we want to even document the Inference API usage.

[jonathan-buttner]

Looks good! I'll defer to Max and the search team if they want the inference API documented.

[shubhaat]

@szabosteve we discussed this in the EIS leads meeting today, and have a few major changes to the plan. Given that the first release is for the LLM to be available only for the AI assistants, and we are not telling customers the underlying model, we want to perhaps only update EIS docs when we introduce ELSER in 9.1/8.19.

For now we only want to update the AI Assistant docs and the Playground docs to include that we now host a default LLM (ElasticLLM) that is available out of the box. The ElasticLLM is hosted as a service and will entail additional charges as per our pricing. We should link out to the pricing page.

[szabosteve]

@shubhaat Thank you for the heads-up! I'll leave this PR open and amend it as necessary when we are ready to publish the docs in 9.1.