Add tooltipLabels field to ChartData

Signed-off-by: Alex Andreev <alex.andreev.email@gmail.com>

src/renderer/components/chart/chart.tsx

@@ -13,6 +13,7 @@ import { Badge } from "../badge";
 
 export interface ChartData extends ChartJS.ChartData {
   datasets?: ChartDataSets[];
+  tooltipLabels?: ChartTooltipLabel[];
 }
 
 export interface ChartDataSets extends ChartJS.ChartDataSets {
@@ -36,6 +37,8 @@ export interface ChartProps {
   className?: string;
 }
 
+type ChartTooltipLabel = (percent: string) => string | string;
+
 export enum ChartKind {
   PIE = "pie",
   BAR = "bar",