Test

Add Myst (new tech stack) workflow #122

Job	Run time
Build static site with tox	57s
Build static site with pixi	20s
tox on ubuntu-latest with Python 3.12	59s
tox on macos-latest with Python 3.12	56s
tox on windows-latest with Python 3.12	1m 56s
tox on ubuntu-latest with Python 3.11 and oldest versioned dependencies	53s
Build jupyterlite site with pixi	22s
Build and execute static site with myst	50s
pixi on macos-latest with py311	15s
pixi on ubuntu-latest with py311	20s
pixi on ubuntu-latest with py312	20s
pixi on windows-latest with py312	27s
pixi on windows-latest with py311	25s
tox on ubuntu-latest with Python 3.13 and developer versioned dependencies	1m 11s
pixi on macos-latest with py312	15s
	10m 26s

Provide feedback