增加Serie的barPercentStack参数，可配置百分比堆叠柱状图

Scripts/UI/Internal/BaseChart.cs

@@ -291,6 +291,7 @@ namespace XCharts
                 for (int j = 0; j < serie.data.Count; j++)
                 {
                     var serieData = serie.data[j];
+                    if(j>100) break;
                     //if (!serie.label.show && !serieData.showIcon) continue;
                     var textName = s_SerieLabelObjectName + "_" + i + "_" + j + "_" + serieData.name;
                     var color = Color.grey;