feat(SW-186): implemented queries and typings for menu inside header query

lib/graphql/Fragments/Header/InternalOrExternalLink.graphql

@@ -0,0 +1,22 @@
+#import "../PageLink/ContentPageLink.graphql"
+#import "../PageLink/LoyaltyPageLink.graphql"
+
+fragment InternalOrExternalLink on InternalOrExternalLink {
+  is_external_link
+  open_in_new_tab
+  external_link {
+    href
+    title
+  }
+  page_link {
+    linkConnection {
+      edges {
+        node {
+          ...ContentPageLink
+          ...LoyaltyPageLink
+        }
+      }
+    }
+    link_title
+  }
+}