Add Pandas integration for Datafiles

[skasberger]

Add a pandas integration for spreadsheet datafiles. There are two options to do this:

1. Create an API request with DataAccess.get_datafile(), which should return an Pandas Dataframe instead of the requests.Response object.
2. Create an API requests with DataAccess.get_datafile(), which should return an models.Datafile() object, with the data stored inside and an offered method .to_df() to get the data as a Pandas Dataframe.

Idea coming from https://github.com/gdcc/pyDataverse/issues/80.

Prepare

• [ ] Research both ways
  • [ ] Talks with users

Implementation

• [ ] Write tests
• [ ] Write code
• [ ] Update Docs
  • [ ] Write tutorial
• [ ] Update Docstrings
• [ ] Run pytest
• [ ] Run tox
• [ ] Run pylint
• [ ] Run mypy

Review

• [ ] Docs

Follow-Ups

[pdurbin]

As discussed during the 2024-02-14 meeting of the pyDataverse working group, we are closing old milestones in favor of a new project board at https://github.com/orgs/gdcc/projects/1 and removing issues (like this one) from those old milestones. Please feel free to join the working group! You can find us at https://py.gdcc.io and https://dataverse.zulipchat.com/#narrow/stream/377090-python