[Discover] Unified histogram

[kertal]

This is a high level overview how to implement the Enhanced Histogram in Discover, in the end it should look like this:

So here's a high level plan

• Migrate the histogram layout of Discover to the new one, without switching to Lens [Discover] Redesign layout to prepare for unified_histogram #138697
  • That way we can better tweak the size, etc.
  • And with the early change how the Documents + Field Statistics are rendered we can get early feedback + this change makes Discover more flexible in terms of extensibility
• Migrate to unified-histogram plugin [Discover] Migrate resizable layout and histogram to unifiedHistogram plugin #141992
  • Will allow us to share the resizable layout and histogram with other plugins later
  • Will also make it easier to integrate Lens in the next task
• Make use of Lens embeddable [Discover] Update unified histogram chart to use Lens #143108
  • Will set the foundation for adding breakdown support
  • POC work for Lens [Discover] Lens poc #138594
• Implement Break-down by functionality [Discover] Implement unified histogram break down UI element #142390
• Share with solutions

Related issues and insights:

• [Discover] Histogram cleanup #140368

[elasticmachine]

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