Add unprimed clocks to hexagon and resample measurements

After #94 (closed), all signals and measurements are sampled according to the lab timeframe. We should

• introduce 3 clocks (just the clock fluctuations for now?, i.e., pink noise)
• simulate sidebands
• simulate 3 sideband-to-sideband beatnotes
• resample each beatnote according to one clock
• make sure that 3-signal combination is no longer vanishing

And in post-processing, make sure that applying the algorithm from the paper yields a zero combination.

At this stage, we only have 3 clocks ("primed" clocks and electrical signals are not simulated, we assume that they are zero).