[Fabric] Add support for native key event handling (#12146)

* [Fabric] Add support for native key event handling

* format

* Change files

* fix

* fix

* Add support for 3rd party components to hook into key events

* fix

* Move CompositionEventHandler key handing into a function that can be shared with core input in future

* fix

* fix

* fix

* update snapshots

* format

Author: acoates-ms

change/react-native-windows-0a4ff42f-7ea1-4da7-a054-828f7df62e9b.json

@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "[Fabric] Add support for native key event handling",
+  "packageName": "react-native-windows",
+  "email": "[email protected]",
+  "dependentChangeType": "patch"
+}