* Support for custom markdown-it parser configuration via a pytest hook

Initial custom runner support.

Drops support for Python 3.8

* Changes object traveral logic

    * Prevents infinite recursion
    * Prevents duplicate tests
    * Include objects with underscore prefixes

* Support for mkdocs material superfences syntax

* Use real line numbers from source file for docstring tests

* Adds support for metadata through .mdx comment syntax

* Use unique names for each test item
* Use uv for project management

*pytest 8.1.x compatibility

* Add support for pytest 8

* Drop support for pytest 6
* Fix critical bug allowing syntax errors to pass tests

Releasing version 0.4.2

* Upgrade markdown-it dependency to ~2.2.2

Releasing version 0.4.2

* Fix small bug in traceback reconstruction

Releasing version 0.4.1

* Typing compatibility with Python 3.7