[3.5.0-pre] Filter.Add behavior changed, throws exeption

[g-jozsef]

when adding the entity twice to a filter it now throws an exception instead of returning false

Svelto.ECS/com.sebaslab.svelto.ecs/Core/Filters/EntityFilterCollection.cs

Line 222 in bc53d38

//TODO: check what happens (unit test) if adding the same entityID twice

public void Add(uint entityId, uint indexInComponentArray)
used to be
public bool Add(uint entityId, uint indexInComponentArray)

[sebas77]

I do not remember at all why I changed this behaviour, but I 100% changed it purposely. We need to discuss what I could possibly wanted to avoid and pros and cons