Add change file for FlatList functional tests

Author: Copilot

change/react-native-windows-75516c9de09c70517cc57dc3854efed7.json

@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "Add functional tests for FlatList component",
+  "packageName": "react-native-windows",
+  "email": "198982749+Copilot@users.noreply.github.com",
+  "dependentChangeType": "patch"
+}