ILauncher launch events and intercept

[profix898]

Is your feature request related to a problem? Please describe.

It's great that we now have a cross-platform URI/file launcher (ILauncher) in Avalonia. However, I would like to add the ability

1. to be notified by an event about the URI/file launch and
2. to intercept the call and handle the URI/file myself

Use cases are situations where you want to either a) redirect an external Uri (e.g. to you app's website) to a view within your app or b) your app uses Uri-based navigation (to perform UI actions based on the user invoking a Uri path).
In principle, it would even allow rewriting the URI (before launching a platform browser).

Describe the solution you'd like

I would like to introduce a new event on ILauncher implementations that gets invoked when a Uri/file launch happens. The event arguments should carry information about the Uri/file and have a property to cancel the default invocation.

Describe alternatives you've considered

Previously I had a custom Hyperlink(button) and URI launcher implementation. Having the launcher in Avalonia directly means that there will be third-party controls using ILauncher. So it would be great to have some flexibility to intercept, rewrite or handle Uri/file launch calls.

Additional context

No response