feat(types,utils): add promotions create with application method (#5945)

What:

- Promotions can be created with its bare attributes
- Promotions one to one relationship with ApplicationMethod can be created with its attributes + validation

RESOLVES CORE-1592
RESOLVES CORE-1595

packages/utils/src/bundles.ts

@@ -4,6 +4,7 @@ export * as EventBusUtils from "./event-bus"
 export * as FeatureFlagUtils from "./feature-flags"
 export * as ModulesSdkUtils from "./modules-sdk"
 export * as ProductUtils from "./product"
+export * as PromotionUtils from "./promotion"
 export * as SearchUtils from "./search"
 export * as ShippingProfileUtils from "./shipping"
 export * as OrchestrationUtils from "./orchestration"

packages/utils/src/index.ts

@@ -7,6 +7,7 @@ export * from "./feature-flags"
 export * from "./modules-sdk"
 export * from "./pricing"
 export * from "./product"
+export * from "./promotion"
 export * from "./search"
 export * from "./shipping"
 export * from "./orchestration"

packages/utils/src/promotion/index.ts

@@ -0,0 +1,20 @@
+export enum PromotionType {
+  STANDARD = "standard",
+  BUYGET = "buyget",
+}
+
+export enum ApplicationMethodType {
+  FIXED = "fixed",
+  PERCENTAGE = "percentage",
+}
+
+export enum ApplicationMethodTargetType {
+  ORDER = "order",
+  SHIPPING = "shipping",
+  ITEM = "item",
+}
+
+export enum ApplicationMethodAllocation {
+  EACH = "each",
+  ACROSS = "across",
+}