Test

Add Myst (new tech stack) workflow #112

Job	Run time
Build static site with tox	47s
tox on ubuntu-latest with Python 3.12	1m 0s
tox on macos-latest with Python 3.12	58s
pixi on ubuntu-latest with py312	23s
pixi on macos-latest with py311	22s
pixi on macos-latest with py312	16s
tox on ubuntu-latest with Python 3.13 and developer versioned dependencies	1m 9s
pixi on ubuntu-latest with py311	23s
Build and execute static site with myst	45s
tox on windows-latest with Python 3.12	1m 34s
pixi on windows-latest with py312	22s
pixi on windows-latest with py311	23s
Build static site with pixi	21s
Build jupyterlite site with pixi	21s
tox on ubuntu-latest with Python 3.11 and oldest versioned dependencies	47s
	9m 51s

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