[DOCS] Add cases open API output to appendix

[lcawl]

Summary

Relates to #137240

This PR uses the open API v3 specification (from #138779 with some additional changes underway). It takes output from the open-api generator, in particular the HTML generator, applies a custom template and uses that output in a passthrough block in an appendix in the Kibana Guide.

Subsequent improvements to this process and to the stylesheet are expected.

NOTE:
Due to the volume of APIs and dependencies, I've split the first four into a separate PR: #142173

[github-actions]

Documentation preview:

• ✨ Changed pages

[kibana-ci]

💔 Build Failed

• Buildkite Build
• Commit: cb5a459
• Interpreting CI Failures

Failed CI Steps

• FTR Configs #13
• FTR Configs #13
• FTR Configs #20

Test Failures

• [job] [logs] FTR Configs #20 / apis uptime uptime REST endpoints uptime CRUD routes AddProjectMonitors project monitors - deletes monitors when keep stale is false
• [job] [logs] FTR Configs #13 / machine learning - data frame analytics classification creation bank marketing displays the analytics job in the map view
• [job] [logs] FTR Configs #13 / machine learning - data frame analytics classification creation bank marketing displays the analytics job in the map view
• [job] [logs] FTR Configs #13 / machine learning - data frame analytics classification creation bank marketing edits the analytics job and displays it correctly in the job list
• [job] [logs] FTR Configs #13 / machine learning - data frame analytics classification creation bank marketing edits the analytics job and displays it correctly in the job list
• [job] [logs] FTR Configs #13 / machine learning - data frame analytics classification creation bank marketing navigates through the wizard and sets all needed fields
• [job] [logs] FTR Configs #13 / machine learning - data frame analytics classification creation bank marketing navigates through the wizard and sets all needed fields
• [job] [logs] FTR Configs #13 / machine learning - data frame analytics classification creation bank marketing runs the analytics job and displays it correctly in the job list
• [job] [logs] FTR Configs #13 / machine learning - data frame analytics classification creation bank marketing runs the analytics job and displays it correctly in the job list
• [job] [logs] FTR Configs #13 / machine learning - data frame analytics outlier detection creation iowa house prices edits the analytics job and displays it correctly in the job list
• [job] [logs] FTR Configs #13 / machine learning - data frame analytics outlier detection creation iowa house prices edits the analytics job and displays it correctly in the job list
• [job] [logs] FTR Configs #13 / machine learning - data frame analytics regression creation electrical grid stability edits the analytics job and displays it correctly in the job list
• [job] [logs] FTR Configs #13 / machine learning - data frame analytics regression creation electrical grid stability edits the analytics job and displays it correctly in the job list
• [job] [logs] FTR Configs #13 / machine learning - data frame analytics regression creation electrical grid stability navigates through the wizard and sets all needed fields
• [job] [logs] FTR Configs #13 / machine learning - data frame analytics regression creation electrical grid stability navigates through the wizard and sets all needed fields

Metrics [docs]

✅ unchanged

History

• 💚 Build #76388 succeeded 9f33966
• 💚 Build #76286 succeeded 20c4817
• 💚 Build #76285 succeeded d088de9
• 💚 Build #76263 succeeded f8234f5

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[lcawl]

Due to the volume of APIs and dependencies, I'll split this work into smaller PRs.