Make soft-ik work! :)
softIk: Code cleanup

Still need global scale support
todo: maybe write a custom softIkConstraint?
Prepare ground for space-switching

allow access to python variables through serialized networks
add omtk.libs.libSerialization.getConnectedNetworksByHierarchy
add ‘canPinTo’ attribute to RigPart
add omtk.rigging.autorig.RigPart.get_spaceswitch_targets to enumerate
all available pin obis for future spaceswitch implementation