Horizontal legends are truncated when too many series are used

[Samsv77]

Hi,
When displaying horizontal legends, and too many series, the legends are extending beyond the chart, and beyond the image, and are truncated.
This happens often when the series names are long

Configuration:
styler.setLegendPosition(LegendPosition.OutsideS);
styler.setLegendLayout(LegendLayout.Horizontal);

Expected:
Legends should go to the next line when the current line is too long.

[timmolter]

[timmolter]

Addressed in #1007.

Horizontal legends now wrap onto additional rows once a row would exceed the image width (keyed off the chart width), so the legend no longer spills past the edges — matching the requested "go to the next line when the current line is too long" behavior. This is applied automatically by default; single-row legends render exactly as before.

For the record, two alternative/complementary approaches were considered but intentionally left out of the initial PR to keep it focused:

1. Opt-in flag (e.g. setLegendWrap(true)) — gate wrapping behind a styler flag to preserve the old single-row overflow for anyone relying on it. Default-on wrapping was chosen instead since the current behavior (truncation past the image) is a clear defect rather than a feature.
2. Configurable max row width (e.g. setLegendMaxWidth(px)) — let callers wrap at a width other than the chart width. Easy to add on top of the current implementation (getHorizontalLegendMaxRowWidth() is the single place that decides the threshold).

Happy to follow up with either if wanted.