fix: export XR library from typescript

Author: okwasniewski

packages/react-native/types/index.d.ts

@@ -146,6 +146,7 @@ export * from '../Libraries/Utilities/Dimensions';
 export * from '../Libraries/Utilities/PixelRatio';
 export * from '../Libraries/Utilities/Platform';
 export * from '../Libraries/Vibration/Vibration';
+export * from '../Libraries/XR/XR';
 export * from '../Libraries/YellowBox/YellowBoxDeprecated';
 export * from '../Libraries/vendor/core/ErrorUtils';
 export {