fix(utils): bignumber util considers nullable options when setting value (#6499)

what:

- when setting null for nullable columns, big number utils should not throw error
- remove circular soft delete depenedencies for cart module
- trims zeros on big number values

packages/cart/src/models/line-item-adjustment.ts

@@ -24,7 +24,7 @@ import LineItem from "./line-item"
 export default class LineItemAdjustment extends AdjustmentLine {
   @ManyToOne({
     entity: () => LineItem,
-    cascade: [Cascade.REMOVE, Cascade.PERSIST, "soft-remove"] as any,
+    cascade: [Cascade.REMOVE, Cascade.PERSIST],
   })
   item: LineItem
 

packages/cart/src/models/shipping-method-adjustment.ts

@@ -20,7 +20,7 @@ import ShippingMethod from "./shipping-method"
 export default class ShippingMethodAdjustment extends AdjustmentLine {
   @ManyToOne({
     entity: () => ShippingMethod,
-    cascade: [Cascade.REMOVE, Cascade.PERSIST, "soft-remove"] as any,
+    cascade: [Cascade.REMOVE, Cascade.PERSIST],
   })
   shipping_method: ShippingMethod