Add attribute support (via 'annotation' directive) (#97)

This PR adds an 'annotation' directive to our Sphinx integration which
enables documenting attributes. In Sphinx, attributes are an existing
concepts, which refer to what Chapel would call fields. As a result, the
`attr` directive was taken, and `attribute` on top of that seemed
confusing. @lydia-duncan suggested 'annotation' (perhaps in jest), but I
think it's a pretty decent fallback.

Another PR to chpldoc will be necessary to actually emit 'annotation'
directives; it will not be part of this.

Reviewed by @lydia-duncan -- thanks!

Add support for interfaces (#95)

Adds support for `interface`, which will be outputed by chpldoc after
chapel-lang/chapel#25825

[Reviewed by @lydia-duncan]

Made to record the state that was pushed to PyPI after we verified ou…

…r Github

Action to push there still worked.

Update dependencies: docutils 0.20.1, Sphinx 7.2.6 (#92)

This is to go along with
chapel-lang/chapel#24612 . The changes to
test/test_chapeldomain.py avoid a problem when using docutils 0.19 or
newer that came up with the way the test was using mocked objects.

Reviewed by @lydia-duncan - thanks!

Merge pull request #90 from jabraham17/fix-links

Fix links for nested types

Reviewed by @lydia-duncan

Merge pull request #88 from jabraham17/fix-return-intent

Add fix for return intent formatting in chromium browsers

Merge pull request #86 from lydia-duncan/revertSetupToolsInclusion

Undo setuptools changes and try a different strategy to fix the release
[not reviewed]

Don't include setuptools in the new package, include it in the environment
used to make the new package

Merge pull request #78 from jabraham17/fix-operator-names

Fix signature regex to match more possible operator names

Merge pull request #76 from nikkirad/nikrad

Revert version for PyPI

Merge pull request #72 from nikkirad/nikrad

Recognize where clauses