Sphinx-last-updated-by-git

* Support for changed behavior of ``source-read`` event in Sphinx 7.2

* A few build system and test updates

* Add ``git_exclude_patterns`` and ``git_exclude_commits`` features

* Remove ``page_source_suffix`` from ``context`` if there is no source link

* Use ``--no-show-signature`` to avoid error when ``log.showSignature`` is on
* Properly stop ``git log`` subprocess even on error (to avoid warnings)

* Handle "added" but not yet "committed" files