Add change file for momentum scroll implementation

Co-authored-by: anupriya13 <54227869+anupriya13@users.noreply.github.com>

Author: Copilot

change/react-native-windows-8a4ff7bf-ac06-4eb1-9a58-378dc5d976fa.json

@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "Implement onMomentumScrollEnd and onMomentumScrollBegin for Fabric ScrollView",
+  "packageName": "react-native-windows",
+  "email": "198982749+Copilot@users.noreply.github.com",
+  "dependentChangeType": "patch"
+}