[WIP] UI Specifiable Sketches

[kneitinger]

Status

right now, this PR is just a rough hard-coding of the type of code that a macro like #[sketchlist] would generate.

Aesthetically (in both the UI and the macros) there is a bit to figure out still, but the foundation seems solid enough.

Todo

• Add sketchlist macro. The scratch commit in this PR has it as an attribute macro, but that might be kind of clunky since it needs to apply to an item. In this case, a module is the only semi-appropriate item, and even that feels clunky since its contents are not really going to be passed through to the resulting code. A better choice might be a proc macro function-like macro.
• Prettier sketch selection in UI. Right now it is hard-coded radio buttons as a proof of concept. egui selectable labels might be more visually appealing, but a drop down might make the most sense.
• Adding a sketch to the sketch list (in whatever form it takes) should be a one line operation (regardless of egui or clap).

[kneitinger]

Also todo: that first commit definitely should not have passed lol.

Incorporate unused, etc denies into #1

[kneitinger]

Closed in favor of #23