export current duc (related to #16)

[exoad]

add a button to export and create duc groups that can be exported and saved. this can be thought of as folders.

the general ordering of the ducs will be similar to a folder/file layout

[exoad]

the ordering will be stored within one hive box just bc it is much simpler instead of having another lookup table for finding all of the available boxes (also makes managing data transfer less painful).

the data exportation will follow something like this json layout:

[
{"team":{"prelim":{},...},
{...}
]

all of the data here can be compressed using the duc standard or exported plainly.

but for now, only plan on supporting on one layer of exportation which is json and duc json. this in turn can be exported between persons of interest

[exoad]

suggested layout:

[{"team":1203,"data":{"prelim":{},...}}]

or another suggested layout is exporting as bson or another ecnoded format (this would be referred to as DUC export):

https://pub.dev/packages/bson

or base64 applied with gzip in order to allow for more contentful data transfers