[Lens] Use ECS schema information in field browser and suggestions

[wylieconlon]

ECS schemas indicate which fields are related, and contain example data, descriptions, and more. We can use this to display helpful information in the field browser. Suggestions could also be generated using related fields or common analysis techniques that we know about.

https://github.com/elastic/ecs/blob/master/generated/ecs/ecs_flat.yml

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[ghudgins]

need to list some possible applications of ECS schema in this issue to move forward

[ruflin]

This issue here is related: #169256 We can not only list ECS info, but also info from integrations, otel, GenAI to provide even more info and assist users. For metrics, this could even support Lens to pick what are the aggs that are recommended for a specific field.

[elasticmachine]

Pinging @elastic/kibana-data-discovery (Team:DataDiscovery)

[stratoula]

@elastic/kibana-data-discovery adding you also here as you are currently discussing this with the Obs team. Not sure if there is another issue tracking this. If yes, can you link it here and close this issue? Thanx!

[kertal]

I don't think there is, lot's of related issues like
#95551
#97246
Might be worth a dedicated, new issue, closing the old ones

[kertal]

Since we now have a Fields metadata service, this can be implemented: #183806