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/bookings/entities/booking-container-unit.entity.ts

@@ -32,6 +32,10 @@ export class BookingContainerUnit extends BaseEntity {
   @Column({ name: 'is_reefer', type: 'boolean', default: false })
   isReefer!: boolean;
 
+  /** This container ships back empty after unloading (equipment return). */
+  @Column({ name: 'is_return', type: 'boolean', default: false })
+  isReturn!: boolean;
+
   @Column({ name: 'sort_order', type: 'smallint', default: 0 })
   sortOrder!: number;