Plot continuous predict

[ReneSkukies]

I plan to do this myself in the not-so-distant future, but so I don't forget:

Make function plot_continuous_predict( ) that plots continuous data on top of the recorded (raw) data. This can/ should be done in three ways:
Once just the continuous predicted data (i.e. data without residuals)

Once each event type gets its own continuous line and colour; events are overlap corrected

Only plot one overlap corrected "target" event as continuous data on top of raw

Kinda low priority, but could be nice to have for data inspection. Also dependent on the predict function that is currently being implemented into Unfold.jl

[behinger]

have a look at https://docs.makie.org/stable/reference/plots/datashader/ for speed in case of multi-sensor data