Very basic UI

[GenericConfluent]

Task

Build the following using iced:

• Input into the text box should be added to the list of desired classes after an enter.
• The delete icon should remove stuff (kind of obvious)
• All desired classes should be in the required classes in sorted order.
• The little icon should be able to handle click events but the event handler can be empty. It'll be used later on to either open the graph as an SVG in-app or in the user's default web browser.

Motivation

Have a bare UI that can be used to test the key features.

Implementation

All using the basic widgets that come along with iced. See iced todos example if you have never used iced before, it very similar to the side panel so it should be a good place to start using the todos example as a reference.

[GenericConfluent]

I was going to start on this, but iced-rs/iced#2297 happens to affect me. I'll be working on #4 instead. I'll push the little I wrote to the repo.

[GenericConfluent]

Alignment, spacing and colouration need more work. Otherwise, the skeleton is in place.