[Dashboards] add hide empty category option for pie charts (#16550)

closes
https://discord.com/channels/1130383047699738754/1445403391722520677


https://github.com/user-attachments/assets/980225a8-153e-4b49-89f7-5944227c8fdb


toggle label ie `Hide empty category` -- debatable

packages/twenty-server/src/engine/metadata-modules/page-layout/dtos/pie-chart-configuration.dto.ts

@@ -81,6 +81,11 @@ export class PieChartConfigurationDTO {
   @IsOptional()
   displayLegend?: boolean;
 
+  @Field(() => Boolean, { nullable: true, defaultValue: false })
+  @IsBoolean()
+  @IsOptional()
+  hideEmptyCategory?: boolean;
+
   @Field(() => String, { nullable: true })
   @IsString()
   @IsOptional()