feat: Tracking modifiers with logical OR

[krispya]

Using multiple traits in a tracking modifier works, but it uses logical AND. There is no way to track with a logical OR. This PR lets you do that using the Or operator. Works for changed, added and removed.

// Track entities where BOTH Position AND Velocity have changed
const fullyUpdated = world.query(Changed(Position, Velocity))

// Track entities where EITHER Position OR Velocity has changed
const eitherChanged = world.query(Or(Changed(Position), Changed(Velocity)))