[feature][formatter] support {d3}

Runtime/Component/Tooltip/Tooltip.cs

@@ -189,6 +189,7 @@ namespace XCharts.Runtime
         /// {g}为当前所指示的serie的数据总个数。</br>
         /// {c0}表示当前数据项维度为0的数据。</br>
         /// {c1}表示当前数据项维度为1的数据。</br>
+        /// {d3}表示维度3的数据的百分比。它的分母是默认维度（一般是1维度）数据。</br>
         /// |表示多个列的分隔。<br>
         /// 示例："{i}", "{.}|{a}|{c}", "{.}|{b}|{c2:f2}"
         /// </summary>

Runtime/Helper/FormatterHelper.cs

@@ -205,7 +205,9 @@ namespace XCharts.Runtime
                 }
                 else if (p == 'd' || p == 'D')
                 {
-                    var rate = total == 0 ? 0 : value / total * 100;
+                    var rate = pIndex >= 0 && serieData != null ?
+                        (value == 0 ? 0 : serieData.GetData(pIndex) / value * 100) :
+                        (total == 0 ? 0 : value / total * 100);
                     content = content.Replace(old, ChartCached.NumberToStr(rate, numericFormatter));
                 }
                 else if (p == 'c' || p == 'C')