[research] PoC for fast time-series visualization

[drewdaemon]

Elastic-charts is a flexible layout engine that can support many chart types. But one of the most important chart types is time-series XY visualizations.

This issue is to PoC an optimized time-series chart path in Elastic charts. The library should expect the data in a format that doesn't require much manipulation before drawing the chart (columnar?). This path can be distinct from the general entry point into Elastic charts.