Center metric layer on pie chart + cleanup (#16105)

https://github.com/user-attachments/assets/bb48bebe-d0be-4006-8f63-e686c70c0011

---------

Co-authored-by: bosiraphael <raphael.bosi@gmail.com>

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

@@ -71,6 +71,11 @@ export class PieChartConfigurationDTO {
   @IsOptional()
   displayDataLabel?: boolean;
 
+  @Field(() => Boolean, { nullable: true, defaultValue: false })
+  @IsBoolean()
+  @IsOptional()
+  showCenterMetric?: boolean;
+
   @Field(() => Boolean, { nullable: true, defaultValue: true })
   @IsBoolean()
   @IsOptional()