Movement of different types of modules?

[KrisThielemans]

At present, the scanner geometry is stationary, but we do have gantry and bed movement

PETSIRD/model/Protocol.yml

Lines 144 to 154 in fa2f043

	BedMovementTimeBlock: !record
	fields:
	# time interval for this time block
	timeInterval: TimeInterval
	transform: RigidTransformation
	GantryMovementTimeBlock: !record
	fields:
	# time interval for this time block
	timeInterval: TimeInterval
	transform: RigidTransformation

For "insert" types of cases, would it be useful to have the capability to encode movements of types of modules w.r.t. gantry? (It seems to be easy to do).