Unify user interface crates

[somedevfox]

Connections
None

Description
Luminol's user interface is rendered by three separate crates: ui, modals and components. It never made much sense to me, since all of them handle the same task. This pull request unifies these crates.

Testing

• Run cargo run or trunk run (depending on desired platform) and open the About... window.

Additionally, I have measured compilation times between the dev and my branches by running cargo build in both. Both took the same amount of time to compile.

Checklist

• Run cargo fmt.
• Run cargo clippy. If applicable, add:
  • --target wasm32-unknown-unknown -Z build-std=std,panic_abort
• Run cargo build --release
• If applicable, run trunk build --release

[white-axe]

Looks good but please fix the "Build Trunk" build workflow at some point so that it actually uploads the web build to GitHub

[somedevfox]

Oh, I didn't know it was broken. Thank you for telling me.

[melody-rs]

There's actually a reason why all of these crates were separate- I intended components and modals to be very general and unable to create tabs and windows.

Tabs and windows were combined into the same crate simply because of the MapInfos window- it needed to be able to create the map tab.

[melody-rs]

Looks good but please fix the "Build Trunk" build workflow at some point so that it actually uploads the web build to GitHub

I'll go ahead and fix this