Add NWBZarrIO.read_nwb convenience function #929

Job	Run time
linux-gallery-python3.8-minimum	56s
linux-gallery-python3.12-upgraded	1m 6s
windows-gallery-python3.8-minimum	1m 41s
windows-gallery-python3.12-upgraded	2m 3s
linux-python3.8-minimum	1m 53s
linux-python3.12	2m 17s
linux-python3.12-upgraded	5m 26s
conda-linux-python3.8-minimum	2m 13s
windows-python3.8-minimum	3m 9s
windows-python3.12-upgraded	6m 47s
conda-linux-python3.12-upgraded	4m 40s
macos-python3.8-minimum	3m 4s
macos-python3.12-upgraded	3m 50s
Deploy pre-release from dev	0s
	39m 5s

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