Support screenshot feature (via attachments)

[marandaneto]

@bruno-garcia is gonna link to the develop docs (with the specification)

the idea is that basically, it takes a SS when an event is captured and attach it to the event (via attachments).
the feature is opt-in and it should be turned on via options.

[marandaneto]

we can either implement it natively or use a plugin like https://github.com/nusanet/flutter-native-screenshot
dependencies are never a good idea though, so let's figure this out.

[ueman]

This can be done kinda easily just in Flutter. That way it's also available for all platforms (except the HTML web based renderer).

See https://api.flutter.dev/flutter/rendering/RenderRepaintBoundary/toImage.html

The drawback is that it requires a bit of manual code by the user.

[marandaneto]

nice, we can add support only for flutter non-web then, but the idea is to add it automatically.

[tryadelion]

this sounds awesome. between this and widget tree, would it mean we'd have complete lifecycle tracing, right?

[ueman]

this sounds awesome. between this and widget tree, would it mean we'd have complete lifecycle tracing, right?

What exactly do you mean by that? We already have complete lifecycle tracing?

[tryadelion]

not at performance level yet right? unless my pubspec has missed some big update.

[bruno-garcia]

Currently in a PR: getsentry/develop#422