Improvements to attach!

[ajkeller34]

c/o @mtfang

In the attach! method, is it possible to also allow for t and i to be of type Array instead of Real/Integer? This way multiple objects can be attached directly instead of through some for loop or map function.

Use case example (attaching multiple bridges to multiple segments):

for j in [1, 6, 8, 10]
    for k in 0:0.1:1
        attach!(p12, CellReference(default_bridge, rot = π/2), k, j)
    end
end

Would be:

attach!(p12, CellReference(default_bridge, rot = π/2), 0:0.1:1, [1, 6, 8, 10])