Feature/suik 142 container view

[0xLeif]

Closes #142

Example Usage:

view.embed {
    VStack {
        [
            ContainerView(parent: self) {
                AddViewController { (data) in
                    print(data)
                }
            },
            ContainerView(parent: self) {
                SettingsViewController()
            }
        ]
    }
}