Add Typescript documentation for getting Redux to work

```
let devtools: any = window['devToolsExtension'] ? window['devToolsExtension']() : (f:any)=>f;
let middleware = applyMiddleware(thunk);
const store: any = middleware(devtools(createStore))(rootReducer, {});
```

The issue provides only a Redux and TypeScript snippet and names no documentation file or entry point. First locate the project's documentation and existing Redux guidance; done means adding clear TypeScript instructions for getting Redux to work.

Scritto dal modello di indicizzazione a partire dal testo della issue.