[OpenSTEF 4.0 Epic] Documentation

[egordm]

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🌍 Background

Important

Changes should be done by forking OpenSTEF 4.0.0 tracking branch (release/v4.0.0) and then make a PR back onto release/v4.0.0 branch.
Please read the contributing guide before you start.

[egordm]

Sub-tasks added

• [OpenSTEF 4.0] Optimize tutorial notebooks for CI execution #886 — Optimize tutorial notebooks for CI execution (blocked by docs: integrate myst-nb notebook rendering infrastructure (#884) #885)