Add timeseries functionality to dashboard

[cwmeijer]

See lime (and rise) notebooks in tutorials

https://github.com/dianna-ai/dianna/blob/main/tutorials/rise_timeseries_weather.ipynb
https://github.com/dianna-ai/dianna/blob/main/tutorials/lime_timeseries_weather.ipynb

[stefsmeets]

This is what I have for now:

Some issues that I ran into:

• LIME timeseries interface is not complete yet. The output returns zeroes and the explain_timeseries function is inconsistent with RISE. This is why the bars look gray. -> Fixed by 560 improve results of lime timeseries notebooks #589
• Should explain_timeseries return (normalized) segments?
• What will the data format for timeseries look like? For now I just load a .npy file with a single column of y values. I can imagine this should be some pandas data frame or numpy array with xy data instead.