A customizable, floating tab bar, with a material background, written entirely with SwiftUI.
- TabBarContainer binds your apps views to tabs, using @ViewBuilder.
- TabBarItemPreferenceKey is used to pass data upwards from child views to parent.
- matchedGeometryEffect adds selective highlighting to a floating capsule, ultraThinMaterial tab bar.
- symbolEffect adds animations to icons when a user switches tabs.
