Move customDirectEventTypes to separate files. (#2786)

## Description

`customDirectEventTypes` import inside `createHandler` introduced in #2766 makes web unable to compile since `react-native-web` doesn't provide this object. This PR moves mentioned import into separate file and splits it into `.ts` and `.web.ts` parts 

## Test plan

Tested on web and FabricExample app.

src/handlers/createHandler.tsx

@@ -5,8 +5,7 @@ import {
   DeviceEventEmitter,
   EmitterSubscription,
 } from 'react-native';
-// @ts-ignore - its taken straight from RN
-import { customDirectEventTypes } from 'react-native/Libraries/Renderer/shims/ReactNativeViewConfigRegistry';
+import { customDirectEventTypes } from './customDirectEventTypes';
 // @ts-ignore - it isn't typed by TS & don't have definitelyTyped types
 import deepEqual from 'lodash/isEqual';
 import RNGestureHandlerModule from '../RNGestureHandlerModule';

src/handlers/customDirectEventTypes.ts

@@ -0,0 +1,2 @@
+// @ts-ignore - its taken straight from RN
+export { customDirectEventTypes } from 'react-native/Libraries/Renderer/shims/ReactNativeViewConfigRegistry';

src/handlers/customDirectEventTypes.web.ts

@@ -0,0 +1,5 @@
+// customDirectEventTypes doesn't exist in react-native-web, therefore importing it
+// directly in createHandler.tsx would end in crash.
+const customDirectEventTypes = {};
+
+export { customDirectEventTypes };