Reworked Inspector

[Sima214]

Notably:

• Added preview of bom nodes.
• Changed node hit detection logic to now match the visual shape.
• Added the ability to draw traces.
  You can start a new trace with right click, new segment with left and end it with right.
  This input scheme is probably not intuitive, I am willing to refine it based on feedback and my own experience using it the following days (https://gitlab.com/Sima214/good-old-laser-printer).

[dev-lab]

Thanks for the contribution and the time you put into this PR.

I tested it against the current application behavior and unfortunately it introduces a regression in Inspector that prevents inspecting (viewing) net nodes across all opened layers. It also changes some UI behavior/colors and adds functionality that is outside the direction I currently want for the project.

While I do plan to show other nets later (when I have more time), I never intended to support manual trace drawing. My goal is to keep trace generation automatic, even if the generated traces do not exactly correspond to the existing PCB layout, please refer to the PcbVisualizer part of the underlying WireBender library.

Because of that, I’m not going to merge this PR.

I still appreciate the effort and your interest in contributing.