Drop Apex Dynamics from the playable roster (2 races now: Inner Sphere
Navy, Outer Rim Collective) to simplify the 2D art pipeline; World's
race-offer logic just shuffles both remaining races instead of picking
2 of N. Also fix bullets using a constant muzzle velocity instead of
adding the shooter's own velocity, and shrink the bullet hitbox/sprite.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Checkpoint of the existing flat file layout prior to restructuring
into autoload/, menu/, ships/, world/, and assets/ folders.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>