Manage sf_hydro_regions object
Should we keep them as datasets or make a function that returns a different object depending on a 'territory' argument?
Currently, the package contains the following data sets:
- `sf_hydro_regions_gua`
- `sf_hydro_regions_met`
- `sf_hydro_regions_mtq`
- `sf_hydro_regions_myt`
- `sf_hydro_regions_reu`
They could therefore be replaced by the following function:
```r
get_sf_hydro_regions(territory = "Mayotte")
```
issue