egui implementation

[MeoMix]

Creating a robust and compelling user interface in Rust/Bevy is non-trivial. Bevy provides an in-house UI implementation, but it's too barebones and exceptionally verbose. There is no plug-and-play component framework natively provided by Bevy at this time.

Originally, I ignored my concerns and attempted to implement a UI using Bevy's tooling. This proved exceptionally time consuming and the cost/benefit trade-off was abysmal. It was several hundred lines of code to create the most trivially styled dialog.

In response to this, I abandoned Bevy's UI implementation and searched for alternatives. The most immediately promising solution was to use egui + bevy_egui to integrate the two frameworks. egui is currently responsible for creating the menus seen within the app.

Numerous high-level questions still linger, though:

• egui does not scale with zoom in/out of the world map. Should it?
• egui UI appears too small on mobile devices. How to elegantly resolve?
• what does a "good" ui look like for Underground View? when will that be created?
• how to create a mobile/responsive UI using egui? how high should this be prioritized?
• is it worth considering alternatives such as Belly or Kayak? Why?

Additionally, there are low-level implementation questions:

• How to completely reset an egui window position on game restart?

[porkcharsui]

Just a though ... Mini-map seems vital to the UX since it's currently unclear how much of the world is currently visible from the current camera.