Add basic JS implementation support for react-native-windows 🎉 (#4917)

## Summary

This pull request introduces support for react-native-windows! 🎉
However, please note that it does not include native support. Instead,
it enables the web implementation of Reanimated for the Windows
platform.

Kudos to [@hsjoberg](https://github.com/hsjoberg) because his PR
[#4669](#4669)
was an inspiration for this one! 🙌

## Test plan

```
npx react-native init reanimatedWindows --version "latest"
cd reanimatedWindows
npx react-native-windows-init --overwrite
yarn add react-native-reanimated
npx react-native run-windows
```

src/reanimated2/PlatformChecker.ts

@@ -16,10 +16,14 @@ export function isAndroid(): boolean {
   return Platform.OS === 'android';
 }
 
+function isWindows(): boolean {
+  return Platform.OS === 'windows';
+}
+
 export function shouldBeUseWeb() {
-  return isJest() || isChromeDebugger() || isWeb();
+  return isJest() || isChromeDebugger() || isWeb() || isWindows();
 }
 
 export function nativeShouldBeMock() {
-  return isJest() || isChromeDebugger();
+  return isJest() || isChromeDebugger() || isWindows();
 }