Item description generators

[jarena3]

When item notes are implemented, item note generators can be added too.
Initially, the core book rollable tables for hardsuits and pilot weapons should be implemented as random generators (like eg. clone quirks) -- but this can and should be expanded for other items.
Descriptions could pull from class, size/mount, type, manufacturer, and item-specific pools.

[jarena3]

Probably out of scope, users adding their own descriptions if they want should suffice