feat: view config feature flag (#13171)

* feat: add view_configurations feature flag

  - Add feature flag provider and hooks to admin dashboard
  - Add backend API endpoint for feature flags
  - Create view_configurations feature flag (disabled by default)
  - Update order list table to use legacy version when flag is disabled
  - Can be enabled with MEDUSA_FF_VIEW_CONFIGURATIONS=true env var

* fix: naming

* fix: feature flags unauthenticated

* fix: add test

packages/admin/dashboard/src/hooks/api/feature-flags.tsx

@@ -0,0 +1,22 @@
+import { useQuery } from "@tanstack/react-query"
+import { sdk } from "../../lib/client"
+
+export type FeatureFlags = {
+  view_configurations?: boolean
+  [key: string]: boolean | undefined
+}
+
+export const useFeatureFlags = () => {
+  return useQuery<FeatureFlags>({
+    queryKey: ["admin", "feature-flags"],
+    queryFn: async () => {
+      const response = await sdk.client.fetch<{ feature_flags: FeatureFlags }>("/admin/feature-flags", {
+        method: "GET",
+      })
+      
+      return response.feature_flags
+    },
+    staleTime: 5 * 60 * 1000, // Cache for 5 minutes
+    cacheTime: 10 * 60 * 1000, // Keep in cache for 10 minutes
+  })
+}