Write a function and task to determine wavelength accuracy

Using the results from PIPE2D-380, provide functions that analyze the accuracy of the wavelength solution determined by the 2D DRP pipeline.

Checks include (but not exhaustive):

1. For a given exposure, estimate the RMS error in wavelength for each fibers. This can be compared with that determined from the pipeline.
2. As above, but provide an overall estimate across all fibers.
3. Examine the error evolution across a number of exposures for any time-dependent trend.

In addition to the RMS error, other statistics should be considered and if appropriate provided. Plots in addition to textual output should be provided - anything that can assist the team to determine any problems with the wavelength solution.