feat: Add supported currencies to store model (#6562)

I ultimately went with having a flat list of settings for the store. It wouldn't be very difficult to change it if we wish to do so, but for now this keeps the codebase simpler

packages/medusa/src/api-v2/admin/stores/query-config.ts

@@ -3,6 +3,7 @@ export const allowedAdminStoreRelations = []
 export const defaultAdminStoreFields = [
   "id",
   "name",
+  "supported_currency_codes",
   "default_sales_channel_id",
   "default_region_id",
   "default_location_id",

packages/medusa/src/api-v2/admin/stores/validators.ts

@@ -1,5 +1,11 @@
 import { Type } from "class-transformer"
-import { IsObject, IsOptional, IsString, ValidateNested } from "class-validator"
+import {
+  IsArray,
+  IsObject,
+  IsOptional,
+  IsString,
+  ValidateNested,
+} from "class-validator"
 import { FindParams, extendedFindParamsMixin } from "../../../types/common"
 
 export class AdminGetStoresStoreParams extends FindParams {}
@@ -41,6 +47,10 @@ export class AdminPostStoresStoreReq {
   @IsString()
   name?: string
 
+  @IsOptional()
+  @IsArray()
+  supported_currency_codes?: string[]
+
   @IsOptional()
   @IsString()
   default_sales_channel_id?: string