[BUG] References to 'handle_links' field should be removed

[LuHuangMSFT]

What happened?

handle_links is no longer being developed as a web app manifest field. It is no longer supported. All features, documentation, and references to handle_links can now be removed.

How do we reproduce the behavior?

References:
https://github.com/search?q=repo%3Apwa-builder%2FPWABuilder%20handle_links&type=code

What do you expect to happen?

No response

What environment were you using?

Additional context

No response