Add error handling to LocalStorage.ts

As per the TODO in LocalStorage.ts:
```
// TODO(@Isha) add error handling here
public static get(key: string, saveEncoder: IgtSaveEncoder): Record {
```

Look at LocalStorage.ts, find the get method with the TODO. Understand the IgtSaveEncoder interface and how errors might occur (e.g., parsing JSON, missing keys). Add try-catch blocks and decide on fallback behavior. Check if there are existing tests for LocalStorage to ensure changes don't break functionality.

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