Expand TraceConfig's ignoreEnt to dynamically determine if an entity should be ignored or not

[zer0k-z]

The TraceConfig interface would therefore be something like this:

interface TraceConfig {
    ignoreEnt?: Entity | ((ent: Entity) => boolean);
    interacts?: TraceInteracts;
    sphereRadius?: number;
}

[Poggicek]

Related to #10

[Vauff]

Seems like they went with the approach from #10 instead in today's pre-release