Graph renderer

Presently the graph rendering system is crap

Needs new uncluttered probably custom written graph / tree renderer that is less ugly

Idea:

1. Each row is a converter class - all types are always horizontal

2. Render as very static stacked divs without zoom / etc features. Use omnic logo like in homepage

No files, tests, or entry points are named. First locate the existing graph rendering implementation and the homepage assets, then clarify the renderer's layout and visual requirements; done should mean a less-ugly static renderer with converter classes arranged as horizontal rows and stacked divs using the omnic logo.

Written by the indexing model from the issue text.