* Add support for Python 3.13
* Fix extracting tox env with -dev Python versions
* Fix view description inspection in Python 3.13
Python 3.13 introduced docstrings for None: https://github.com/python/cpython/pull/117813
In Python 3.12, this is an empty string:
```
➜ python3.12
Python 3.12.6 (main, Sep 10 2024, 19:06:17) [Clang 15.0.0 (clang-1500.3.9.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> d = None
>>> d.__doc__
>>>
```
In Python 3.13, it's no longer empty:
```
➜ python3.13
Python 3.13.0rc2+ (heads/3.13:660baa1, Sep 10 2024, 18:57:50) [Clang 15.0.0 (clang-1500.3.9.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> d = None
>>> d.__doc__
'The type of the None singleton.'
>>>
```
Adding a check in the inspector that get the view description out the view function docstring to catch this edge case.
* Add ci stage to test for broken links in documentation
* Add docs validation to release process
* Update .github/workflows/main.yml
* Update .github/workflows/main.yml
---------
Co-authored-by: Ryan P Kilby <kilbyr@gmail.com>
Co-authored-by: Asif Saif Uddin <auvipy@gmail.com>
