DX: define `docnblive` job in `tox.ini` #293

Job	Run time
style / Determine skipped pre-commit hooks	6s
pytest / Determine job matrix	4s
doc / linkcheck / Check external links	8m 47s
doc / nb / Execute and build documentation	4m 19s
pytest / Run unit tests (3.10, ubuntu-22.04)	56s
pytest / Run unit tests (3.11, ubuntu-22.04)	51s
pytest / Run unit tests (3.12, ubuntu-22.04)	1m 0s
pytest / Run unit tests (3.7, ubuntu-22.04)	1m 5s
pytest / Run unit tests (3.9, ubuntu-22.04)	59s
pytest / Run unit tests (3.8, ubuntu-22.04, ampform)	1m 51s
pytest / Run unit tests (3.9, macos-12)	2m 14s
style / Run taplo through pre-commit	19s
style / Run local pre-commit hooks	1m 52s
style / Push changes	0s
doc / Upload to GitHub Pages	0s
	24m 23s

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