Soul orb contrast

This mod changes the appearance of soul orbs to make friendly and enemy orbs easier to distinguish:

• Before they can be shot: all orbs are white.
• Shootable friendly orbs: blue with a matching blue glow.
• Shootable enemy orbs: red with a matching red glow.

Orbs use a flat, unlit appearance with no shading or highlights. Other soul effects are white. Orb size, movement, and glow timing remain unchanged.