feat(medusa): Add feature flags to store response (#1819)

**What**
- Add `feature_flags` string array to store response

**Why**
- to provide conditional ui in admin corresponding to enabled features

Co-authored-by: Oliver Windall Juhl <59018053+olivermrbl@users.noreply.github.com>

packages/medusa/src/api/routes/admin/store/get-store.ts

@@ -1,9 +1,11 @@
+import { FulfillmentProvider, PaymentProvider, Store } from "../../../../models"
 import {
   FulfillmentProviderService,
   PaymentProviderService,
   StoreService,
 } from "../../../../services"
-import { FulfillmentProvider, PaymentProvider, Store } from "../../../../models"
+import { FeatureFlagsResponse } from "../../../../types/feature-flags"
+import { FlagRouter } from "../../../../utils/flag-router"
 
 /**
  * @oas [get] /store
@@ -25,6 +27,9 @@ import { FulfillmentProvider, PaymentProvider, Store } from "../../../../models"
  */
 export default async (req, res) => {
   const storeService: StoreService = req.scope.resolve("storeService")
+
+  const featureFlagRouter: FlagRouter = req.scope.resolve("featureFlagRouter")
+
   const paymentProviderService: PaymentProviderService = req.scope.resolve(
     "paymentProviderService"
   )
@@ -36,8 +41,11 @@ export default async (req, res) => {
   })) as Store & {
     payment_providers: PaymentProvider[]
     fulfillment_providers: FulfillmentProvider[]
+    feature_flags: FeatureFlagsResponse
   }
 
+  data.feature_flags = featureFlagRouter.listFlags()
+
   const paymentProviders = await paymentProviderService.list()
   const fulfillmentProviders = await fulfillmentProviderService.list()