A UI-centric focus system for Bevy.

This crate provides a system for managing input focus in Bevy applications, including:

• InputFocus, a resource for tracking which entity has input focus.
• Methods for getting and setting input focus via InputFocus and IsFocusedHelper.
• A generic FocusedInput event for input events which bubble up from the focused entity.
• Various navigation frameworks for moving input focus between entities based on user input, such as tab_navigation and directional_navigation.

This crate does not provide any integration with UI widgets: this is the responsibility of the widget crate, which should depend on bevy_input_focus.

Bevy Input Focus