[SYSTEMDS-3835] Add additional context operators #2322
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This patch adds two additional context operators to Scuro. The first one is a StaticWindow operator that, given a number of desired windows, defines the suitable window size and aggregates a sequence into num_window features. The second context operator is a DynamicWindow where a sequence is also aggregated into num_window features with the difference that the window size for more recent data points is smaller than the window size for more historic data points in a timeseries.