Amplify Gen 2 Angular Documentation needs updates

**Describe the content issue**:
The documentation provided for Amplify-Angular shows only the **main.tsx**, like in the React documentation and not **main.ts** for the Angular project
[Angular Set Up Data](https://docs.amplify.aws/angular/build-a-backend/data/set-up-data/)

**URL page where the content issue is**:
Specifically, from the Chapter set-up-data to the rest of the docs, the whole document seems set up for React instead of Angular
[Connect your application code to the data backend](https://docs.amplify.aws/angular/build-a-backend/data/set-up-data/#connect-your-application-code-to-the-data-backend)

Thanks to anyone who is going to fix this