fix: featured main image check (#403)

* fix: add check to make sure relationships exist on products

* chore: add changeset

* fix: missing lock file issue in ci

Author: field123

.changeset/great-cherries-sniff.md

@@ -0,0 +1,5 @@
+---
+"@elasticpath/d2c-schematics": patch
+---
+
+Support cases where relationships property is not defined on products

examples/shopper-accounts-authentication/package.json

@@ -9,7 +9,7 @@
     "lint": "next lint"
   },
   "dependencies": {
-    "@epcc-sdk/sdks-shopper": "^0.0.28",
+    "@epcc-sdk/sdks-shopper": "workspace:*",
     "next": "15.3.1",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",