Add Suffix to User-Agent or Referrer with the version of the TWA

At the moment, the only way I am aware of that we can pass the version of the TWA app I have, is through the Start URL, adding something like /?twa=123

However, if a user accesses the app through opening a Push Notificaiton, or a link from another app/browser, that opens a specific page or so, then the version will not be passed anywhere.

**URL:** /specific-page
**Referrer:** android-app://com.mytwa
**User-Agent:** Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Mobile Safari/537.36

It would be nice if we could add a suffix to the current User-Agent, so we could add the version, e.g.:

**User-Agent:** Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Mobile Safari/537.36 **TWA/123**

Or to the Referrer:

**Referrer:** android-app://com.mytwa+v123

So we could have a reliable way of knowing what version the user is on.

Thank you!