add docs for editing NWB files #856

Job	Run time
linux-gallery-python3.8-minimum	2m 16s
linux-python3.8-minimum	3m 26s
linux-python3.11-upgraded	2m 57s
linux-gallery-python3.11-upgraded	2m 14s
windows-gallery-python3.8-minimum	4m 2s
windows-python3.8-minimum	4m 25s
windows-gallery-python3.11-upgraded	3m 24s
windows-python3.11-upgraded	4m 12s
macos-python3.8-minimum	5m 39s
conda-linux-gallery-python3.11-ros3	1m 53s
conda-linux-python3.11-ros3	2m 6s
conda-linux-python3.8-minimum	3m 43s
conda-linux-python3.11-upgraded	3m 38s
Deploy pre-release from dev	0s
	43m 55s

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