Implement basic structure for the hexagon experiment

Create a class with

• 3 laser noises
• 3 beatnotes from carriers
• 1 vanishing 3-signal combination

added hexagon label

mentioned in issue #95

created merge request !116 (merged) to address this issue

mentioned in merge request !116 (merged)

closed with merge request !116 (merged)

mentioned in commit ed968c75