[AI Infra] Add docLinks to GenAI Settings Documentation section

[spong]

Summary

As a follow-up to #246099 and #246334, this PR adds docLinks off to the AI Assistant Settings Docs to both the Documentation panel and error toasts when the artifact fails to install (in aid of those in air-gapped environments).

Note: Yes, air-gapped deployments won't be able to load the documentation link, but they'll at least have the URL they need to get further information.

Checklist

Check the PR satisfies following conditions.

Reviewers should verify this PR satisfies this list as well.

• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios

PR developed with Cursor + GPT 5.2

[florent-leborgne]

LGTM

[qn895]

LGTM 🎉

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 1153260

Metrics [docs]

Public APIs missing comments

Total count of every public API that lacks a comment. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats comments for more detailed information.

id	before	after	diff
@kbn/doc-links	88	89	+1

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
aiAssistantManagementSelection	90.8KB	90.9KB	+89.0B
genAiSettings	58.5KB	59.0KB	+592.0B
lists	129.7KB	129.8KB	+89.0B
total			+770.0B

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
core	496.6KB	496.6KB	+89.0B
genAiSettings	5.0KB	5.1KB	+70.0B
total			+159.0B

Unknown metric groups

API count

id	before	after	diff
@kbn/doc-links	88	89	+1

History

• 💔 Build #374258 failed a636cc6

cc @spong