Consider that mpala must be padded with 5 digits -- not 4

[maurolepore]

mpala is the only dataset that has so many quadrats that it needs to be padded with 5 instead of 4 "0".

Write an example showing that if the data is subsetted before it is passed to plot_tag_status_by_subquadrat() the order of maps may be different than expected. So show how to arrange the data before subsetting it.

[maurolepore]

https://forestgeo.github.io/fgeo.plot/reference/plot_tag_status_by_subquadrat.html

[maurolepore]

This issue was noticed when plotting but it highlights the importance of formally defining different fgeo classes (e.g. viefulltable, census, tree, stem, taxa, species) so that the data can be validated in one place when the class is constructed. Right now, the code that checks for valid inputs is scattered across the code base.

I think we need a package just for that.