connect line chart to backend (#15657)

https://github.com/user-attachments/assets/b797c5a8-32a8-4d3e-9fb1-7541d107a19f

optimizations:
before: 


https://github.com/user-attachments/assets/bf45a3f1-5f89-40c1-9ce4-c2d912b77d63


after:


https://github.com/user-attachments/assets/61bfd603-7b63-4695-8ae8-68fe7d3bfea0

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

@@ -134,6 +134,13 @@ export class LineChartConfigurationDTO {
   @IsOptional()
   filter?: ObjectRecordFilter;
 
+  @Field(() => Boolean, {
+    nullable: true,
+  })
+  @IsBoolean()
+  @IsOptional()
+  isStacked?: boolean;
+
   @Field(() => String, { nullable: true, defaultValue: 'UTC' })
   @IsTimeZone()
   @IsOptional()