Add gesture convenience API for drawer view

[kubalani]

Platform

• iOS
• macOS

Describe the feature that you would like added

hmmmm... I think the client app shouldn't need to worry about this.
Isn't there a way to just attach the drawerController to a specific view/viewcontroller and let it read the gestures and take the appropriate actions?

Originally posted by @rdeassis in #344 (comment)

[rdeassis]

The current DrawerController has a way to present itself through a gesture recognizer that is passed as a parameter from the host of the Drawer.

We should have a similar simple API that does not rely on the client app to have all the logic of presenting it.

Reference:

@objc private func handlePresentingPan(gesture: UIPanGestureRecognizer)