Add additional chart information to to PJs
Description
PJs doesn't include all chart options available from within gitlab-ui.
Examples
https://design.gitlab.com/components/charts#types only mentions column charts, line charts, and area charts.
In addition to these, we also have:
- Scatter chart
- Heatmap
Column charts also support a click interaction - I don't actually think that this is explicitly mentioned in gitlab-ui either.
Additional information
This was raised in discussion over here #541 (comment 333095362)