feat(medusa, utils): Allow object feature flags (#4701)

Feature flags can be set as follows:

**Environment variables**
```
MEDUSA_FF_ANALYTICS=true
MEDUSA_FF_WORKFLOWS=createProducts,addShippingMethods
```

**Project config**
```
{
  featureFlags: {
    analytics: true,
    workflows: {
      createProducts: true,
      addShippingMethods: true,
    }
  }
}
```

packages/medusa/src/api/routes/admin/products/create-product.ts

@@ -1,7 +1,3 @@
-import {
-  CreateProductVariantInput,
-  ProductVariantPricesCreateReq,
-} from "../../../../types/product-variant"
 import {
   IsArray,
   IsBoolean,
@@ -12,6 +8,7 @@ import {
   IsString,
   ValidateNested,
 } from "class-validator"
+import { defaultAdminProductFields, defaultAdminProductRelations } from "."
 import {
   PricingService,
   ProductService,
@@ -26,23 +23,26 @@ import {
   ProductTagReq,
   ProductTypeReq,
 } from "../../../../types/product"
+import {
+  CreateProductVariantInput,
+  ProductVariantPricesCreateReq,
+} from "../../../../types/product-variant"
 import {
   createVariantsTransaction,
   revertVariantTransaction,
 } from "./transaction/create-product-variant"
-import { defaultAdminProductFields, defaultAdminProductRelations } from "."
 
 import { DistributedTransaction } from "@medusajs/orchestration"
-import { EntityManager } from "typeorm"
-import { FeatureFlagDecorators } from "../../../../utils/feature-flag-decorators"
-import { FlagRouter } from "../../../../utils/flag-router"
 import { IInventoryService, WorkflowTypes } from "@medusajs/types"
-import { Logger } from "../../../../types/global"
-import { ProductStatus } from "../../../../models"
-import SalesChannelFeatureFlag from "../../../../loaders/feature-flags/sales-channels"
+import { FlagRouter } from "@medusajs/utils"
+import { Workflows, createProducts } from "@medusajs/workflows"
 import { Type } from "class-transformer"
+import { EntityManager } from "typeorm"
+import SalesChannelFeatureFlag from "../../../../loaders/feature-flags/sales-channels"
+import { ProductStatus } from "../../../../models"
+import { Logger } from "../../../../types/global"
 import { validator } from "../../../../utils"
-import { createProducts } from "@medusajs/workflows"
+import { FeatureFlagDecorators } from "../../../../utils/feature-flag-decorators"
 
 /**
  * @oas [post] /admin/products
@@ -132,7 +132,17 @@ export default async (req, res) => {
   const entityManager: EntityManager = req.scope.resolve("manager")
   const productModuleService = req.scope.resolve("productModuleService")
 
-  if (productModuleService) {
+  const isWorkflowEnabled = featureFlagRouter.isFeatureEnabled({
+    workflows: Workflows.CreateProducts,
+  })
+
+  if (isWorkflowEnabled && !productModuleService) {
+    logger.warn(
+      `Cannot run ${Workflows.CreateProducts} workflow without '@medusajs/product' installed`
+    )
+  }
+
+  if (isWorkflowEnabled && !!productModuleService) {
     const createProductWorkflow = createProducts(req.scope)
 
     const input = {