add per-container handling options for hazardous, reefer, and return services

- Introduced new boolean fields (isHazardous, isReefer, isReturn) in UnitDraft and related interfaces to allow individual container handling options.
- Updated emptyUnit function to initialize these new fields.
- Modified GlCreateBookingForm to handle and display these options for each container.
- Adjusted calculations for hazardous, reefer, and return quantities based on the new handling options.
- Updated the schema for container units and booking container lines to include handling options.
- Added migration to support the new return flag in the database.
- Enhanced various components to reflect gross weight calculations, ensuring consistency across the application.

apps/edr-freight-api/src/modules/contracts/dto/create-booking-under-contract.dto.ts

@@ -50,6 +50,15 @@ export class CreateContainerUnitDto {
   @IsBoolean()
   @Transform(({ value }) => value === 'true' || value === true)
   isReefer?: boolean;
+
+  @ApiPropertyOptional({
+    default: false,
+    description: 'This container ships back empty (equipment return).',
+  })
+  @IsOptional()
+  @IsBoolean()
+  @Transform(({ value }) => value === 'true' || value === true)
+  isReturn?: boolean;
 }
 
 export class CreateBookingContainerLineDto {