add NWBHDF5IO.read_nwb() method #1446

Job	Run time
linux-gallery-python3.8-minimum	2m 1s
linux-gallery-python3.12-upgraded	3m 11s
windows-gallery-python3.8-minimum	3m 0s
windows-gallery-python3.12-upgraded	5m 6s
linux-python3.8-minimum	7m 30s
conda-linux-python3.8-minimum	6m 43s
linux-python3.12-upgraded	7m 28s
conda-linux-python3.12-upgraded	5m 43s
windows-python3.8-minimum	7m 37s
windows-python3.12-upgraded	7m 14s
macos-python3.8-minimum	14m 35s
conda-linux-gallery-python3.12-ros3	1m 29s
conda-linux-python3.12-ros3	1m 32s
Deploy pre-release from dev	0s
	1h 13m 9s

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