Imgui Presentable interface.
This is the main interface used by the crate to allow the users to render enums or structs in ImGui or egui effortlessly.
To switch between the gui backends (ImGui and egui), use the corresponding crate features.
The crate already provides some implementations for the basic Rust types and some other types from other crates, feature-gated.
For the collections, the trait is implemented automatically if the
element type of the collection implements the [ImguiPresentable]
trait itself.