Wishlist of useful harvesters and packers

[broeder-j]

For each of these needs to be decided if they become part of metador-core or an external plugin.
We collect here a list. If you like to work on one of these, document the implementation decision process in an other issue if it will stay in metador-core or in the new created project.

Harvester:

• Base Harvester for any file
• Image files
• Bib, files
• Code files,
• Notebook files, most important ipynb

What about non-file like data?

Packers: