Add script to find lengths of section.name and subsection.name values

[pcraig3]

Summary

I don't know if we really need this for much but it's not really hurting anything.

Added a new Django command to pull down sections and subsections from non-archived NOFOs and to export them to a spreadsheet.

It lives in the folder with our other commands.

Run it with:

poetry run python manage.py section_lengths --all

Or

poetry run python manage.py section_lengths --nofo-id 1

[jtmst]

The section/subsection loops could be a concern if we had millions of them, but thats not an issue at the moment