Test

Add Myst (new tech stack) workflow #49

Job	Run time
Build static site with tox	46s
pixi on ubuntu-latest with py311	30s
Build static site with pixi	30s
pixi on ubuntu-latest with py312	31s
tox on ubuntu-latest with Python 3.12	47s
Build and execute static site with myst	39s
pixi on macos-latest with py311	45s
tox on macos-latest with Python 3.12	45s
pixi on macos-latest with py312	42s
tox on windows-latest with Python 3.12	1m 33s
pixi on windows-latest with py311	2m 13s
tox on ubuntu-latest with Python 3.11 and oldest versioned dependencies	42s
tox on ubuntu-latest with Python 3.13 and developer versioned dependencies	55s
pixi on windows-latest with py312	2m 5s
	13m 23s

Provide feedback