Closes#1005
## Main changes
2. Load vega-embed things using jupyter-book config
3. Add vega-embed dependencies as part of local code for offline
development
4. Reduced duplication in benchmark.js
5. Update sphinx, docutils, and jupyter-book
Co-authored-by: carlocagnetta <c.cagnetta@appliedai.de>
- Batch: do not raise error when it finds list of np.array with different shape[0].
- Venv's obs: add try...except block for np.stack(obs_list)
- remove venv.__del__ since it is buggy
