✨Add custom onPicked callback when asset entity is generated

[yujune]

Context

Currently, when a picture or video is taken using the camera, the AssetEntity is retrieved via:

final assetEntity = await pickFromCamera(context);

This is achieved by calling Navigator.of(context).pop(entity);, which returns the AssetEntity to the previous screen.

However, this approach has a limitation when the CameraPicker widget is used in a scenario where it doesn't trigger a pop event, such as when the widget is part of a tab or a persistent page in a navigation stack. In these cases, there is no straightforward way to retrieve the captured AssetEntity.

Changes

• Introduced a custom onPicked callback that directly provides the generated AssetEntity without relying on the Navigator.of(context).pop(entity);.

[AlexV525]

The idea is good, I'd prefer onPickConfirmed for better readability.

[AlexV525]

Thanks for following up all suggestions!

[AlexV525]

@all-contributors Add @yujune for code

[allcontributors]

@AlexV525

I've put up a pull request to add @yujune! 🎉