Add documentation for SpikeEventSeries #1434

Job	Run time
linux-gallery-python3.8-minimum	1m 58s
linux-gallery-python3.12-upgraded	3m 16s
windows-gallery-python3.8-minimum	3m 2s
windows-gallery-python3.12-upgraded	5m 37s
conda-linux-python3.12-ros3	1m 31s
conda-linux-python3.8-minimum	6m 42s
conda-linux-python3.12-upgraded	5m 46s
conda-linux-gallery-python3.12-ros3	1m 21s
linux-python3.8-minimum	7m 19s
linux-python3.12-upgraded	7m 10s
windows-python3.8-minimum	7m 35s
windows-python3.12-upgraded	7m 35s
macos-python3.8-minimum	11m 20s
Deploy pre-release from dev	0s
	1h 10m 12s

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