Foreach IEnumerable iterator

[CanYouCatchMe01]

I like your ECS library, it is very easy to get started with. While developing, I missed making a standard C# foreach so I could use continue and break when iteration over the objects.

Now it is possible to type this:

foreach ((var entity, A aa, B bb, C cc, D dd) in query.Foreach<A, B, C, D>())
{
    if (aa.x > 0)
    {
        continue;
    }

    if (bb.x > 0)
    {
        break;
    }

    Console.WriteLine($"value x is {aa.x} value y is {aa.y}");
}

I created multiple IEnumerable functions that can take up to 12 components.

public IEnumerable<Tuple<Entity, C1, C2, C3, C4>> Foreach<C1, C2, C3, C4>()
{
    // ...
}

I got inspired by how ENTT makes their view() by returning a tuple.

for(auto [entity, pos, vel]: view.each()) {
    // ...
}