splines='ortho' points row edges to center of row instead of on the side

[Stephanevg]

splines='ortho' allows to specifiy that the edges have a straight line style, instead of a curved one:

in https://github.com/Stephanevg/PSClassUtils/blob/Feature_Composition/PSClassUtils/Functions/Private/Out-CUPSGraph.ps1

when setting:

$Graph = Graph -ScriptBlock {

(No attributes are added) we have the correct result (but with 'curved' lines)

$Graph = Graph -Attributes @{splines='ortho'} -ScriptBlock {

Attributes @{splines='ortho'} is added

Generates the following graph:

The issue, is that without splines=ortho the graph looks really messy when there are a lot of edges involved.