Add Markdown Extra extension #336

Job	Run time
Lint with Ruff (Py3.10)	38s
Test with Py3.10 on ubuntu	1m 48s
Lint with Ruff (Py3.11)	33s
Test with Py3.11 on ubuntu	1m 55s
Lint with Ruff (Py3.12)	33s
Test with Py3.12 on ubuntu	2m 4s
Test with Py3.10 on windows	2m 40s
Test with Py3.11 on windows	2m 39s
Test with Py3.12 on windows	2m 44s
Test with Py3.10 on macos	2m 7s
Test with Py3.11 on macos	1m 48s
Test with Py3.12 on macos	1m 26s
Generate the coverage report	0s
	20m 55s

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