Migrate to geopackage

[bchileen]

Enhancement: Move away from .gdb for spatial data management to geopackage .gpkg support open source geospatial workflows.

Tasks

• [x] FluvialGeomorph/FluvialGeomorph-toolbox#17
• [x] FluvialGeomorph/FluvialGeomorph-toolbox#19
• [ ] branch and unwind feature dataset
• [ ] pull request
• [ ] done! 🍾

[bchileen]

Geopackage seems to be a tougher nut to crack than anticipated, pivoted to addressing user facing bug fixes over an entire overhaul of back end functionality