Add documentation for SpikeEventSeries #1437

Job	Run time
linux-gallery-python3.8-minimum	2m 0s
linux-gallery-python3.12-upgraded	3m 17s
windows-gallery-python3.8-minimum	3m 26s
conda-linux-gallery-python3.12-ros3	1m 34s
windows-gallery-python3.12-upgraded	5m 39s
conda-linux-python3.12-ros3	1m 34s
linux-python3.8-minimum	7m 23s
linux-python3.12-upgraded	7m 8s
conda-linux-python3.8-minimum	6m 45s
windows-python3.8-minimum	7m 54s
conda-linux-python3.12-upgraded	5m 39s
windows-python3.12-upgraded	7m 15s
macos-python3.8-minimum	12m 10s
Deploy pre-release from dev	0s
	1h 11m 44s

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