Cosmetic hex based ship graphics

Inspired by THANCS. Instead of shipsets specifying what the ships would look like, they would specify what the *components* would look like, and ships would be automatically generated out of component hexes.

* Required hull in the center
* Shields in ring around hull
* Armor in ring around shields
* Weapons and thrusters in ring around armor, with weapons toward the front and thrusters toward the back mainly
* Mothership gets a shipyard overlay
* Components would be guessed for enemy ships based on their stats.
* Ship shapes would be defined by the shipset somehow.

No files, tests, or entry points are named. Start by locating the GUI's ship-rendering and shipset/component entry points, then trace how ship stats and mothership state are represented. Done means component hexes generate the required hull, shield, armor, weapon, and thruster rings, support ship shapes, and add the mothership shipyard overlay.

Written by the indexing model from the issue text.