XY Charts: Support data provider styles

Some data providers provider styles for the series, containing the type of series, or colors. They should be taken into account when possible. Otherwise, the xy charts should provide nice defaults if no styles are available.

Start by tracing how XY charts consume data providers in the trace viewer and where series styles are represented. Determine which provider styles are available for series types and colors, then define suitable fallback defaults when they are absent. Done means supported provider styles affect the charts where possible and charts remain usable with sensible defaults.

Written by the indexing model from the issue text.