fix empty export on web (#6171)

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## Summary

React Native Babel preset uses a loose plugin to convert imports to
commonjs, we're investigating switching to a more standard approach in
Expo CLI here expo/expo#30005 which aligns with
how Metro is used at Meta.
 
When running on the kitchen sink, I found that there was an invalid
expression in reanimated where it exports null and then destructures
null. This error didn't occur previously because the commonjs plugin
deferred access to the null object until later.

**Before**

```js
var _Math = _$$_REQUIRE(_dependencyMap[0]);

// Later ...

_Math.add
```

This coincidentally didn't throw because the deferred code is never
accessed.

**After**

```js
var add = _$$_REQUIRE(_dependencyMap[0]).add;
```

This throws because the `null` is accessed when the module is loaded.

## Test plan

Bundle a Metro web project with experimentalImportSupport enabled:

```js
config.transformer.getTransformOptions = async () => ({
  transform: {
    experimentalImportSupport: true,
    inlineRequires: false,
  },
});
```

Then run `npx serve dist` -> Error was there but not anymore.

packages/react-native-reanimated/src/platform-specific/RNRenderer.web.ts

@@ -1,3 +1,3 @@
-'use strict';
 // RNRender is not used for web. An export is still defined to eliminate warnings from bundlers such as esbuild.
-module.exports = null;
+'use strict';
+export {};