added sphinxcontrib-django to extensions

[mfosterw]

Closes #735. To test this, first install the new dependency with pip install requirements/docs.txt and then build the docs normally.

[mfosterw]

This directive causes the fields documented by the extension to be listed twice

[cclauss]

The only problem that I see is that this dependency does not yet support Django v5 and we want to put out a release that does support Dj5. Could you please check to see if that will present problems?

[mfosterw]

Setting the minimum version of Django to 5.0 did not cause any problems installing or running this for me, and since it's only a docs dependency I assume it shouldn't affect users directly.

[cclauss]

Blocked by sphinx-doc/sphinxcontrib-django#66

• Run the tests on Django v5.0 sphinx-doc/sphinxcontrib-django#66 (merged)

[50-Course]

Thank you for this patch @mfosterw, while the former patch to this, does look informative enough, the latter shows great ease of use for developers.

That said we can only push for sphinx-doc/sphinxcontrib-django#66 to get merged.

Once again thank you @cclauss, @mfosterw.

Good job!

[Nusnus]

Very nice, thank you!