Test

Add Myst (new tech stack) workflow #51

Job	Run time
Build static site with tox	50s
Build static site with pixi	29s
Build and execute static site with myst	41s
tox on ubuntu-latest with Python 3.12	45s
pixi on ubuntu-latest with py311	33s
tox on macos-latest with Python 3.12	46s
pixi on ubuntu-latest with py312	28s
tox on windows-latest with Python 3.12	1m 56s
pixi on macos-latest with py311	42s
tox on ubuntu-latest with Python 3.11 and oldest versioned dependencies	41s
pixi on macos-latest with py312	47s
tox on ubuntu-latest with Python 3.13 and developer versioned dependencies	1m 14s
pixi on windows-latest with py311	1m 57s
pixi on windows-latest with py312	1m 31s
	13m 20s

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