Create server-side docLinks service

[pgayvallet]

Summary

Fix #95389

✔️ Depends on elastic/docs#2360

• Introduce a new @kbn/doc-links package
• Move the doc links types and definition from src/core/public/doc_links to it
• Create a server-side DocLinks service

Note: due to the amount of docLinks changes, I will resolve all the conflict at the same time before merging once the PR gets approved

Checklist

• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios

[elasticmachine]

Pinging @elastic/kibana-core (Team:Core)

[pgayvallet]

On the client, we're only exposing the docLinks from the start contract, however on the server-side, I think there's some scenarios where consumers will need to access it at setup too, so I exposed it from both lifecycles.

[afharo]

It looks good to me! Thanks for doing this @pgayvallet!

I just added a few nits for your consideration.

[kibana-ci]

💚 Build Succeeded

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• Commit: 27dc4b5
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Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
core	331	334	+3

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	-	62	+62
core	968	970	+2
total			+64

Async chunks

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

id	before	after	diff
core	132.9KB	132.9KB	+6.0B

Public APIs missing exports

Total count of every type that is part of your API that should be exported but is not. This will cause broken links in the API documentation system. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats exports for more detailed information.

id	before	after	diff
@kbn/doc-links	-	2	+2
kibana	929	930	+1
total			+3

Page load bundle

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

id	before	after	diff
core	291.6KB	292.4KB	+829.0B

Unknown metric groups

API count

id	before	after	diff
@kbn/doc-links	-	62	+62
core	2354	2361	+7
total			+69

History

• 💔 Build #20958 failed e3db48d
• 💚 Build #20616 succeeded 5059eb5
• 💚 Build #20013 succeeded 957504a
• 💔 Build #19992 failed da428b7
• 💔 Build #19970 failed 9ea8917
• 💔 Build #19968 failed 28c6be3

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@elasticmachine merge upstream