docs: Update documentation of examples.
In the basic example, plot Q variables as a step function. For lookup tables, add some background info on interpolation. See https://issuetracker.deltares.nl/browse/RTCTOOLS-755
In the basic example, plot Q variables as a step function. For lookup tables, add some background info on interpolation. See https://issuetracker.deltares.nl/browse/RTCTOOLS-755