DOC: Add 10 year anniversary announcement #779

Job	Run time
py3.13 \| macos \| integration tests	12m 21s
py3.13 \| macos \| unit tests	7m 19s
mypy	3m 56s
py3.13 \| ubuntu \| integration tests	25m 19s
py3.13 \| ubuntu \| unit tests	14m 8s
py3.13 \| windows \| integration tests	32m 37s
py3.13 \| windows \| unit tests	18m 32s
py3.10 \| ubuntu \| integration tests	17m 53s
py3.10 \| ubuntu \| unit tests	12m 56s
py3.11 \| ubuntu \| unit tests	14m 7s
py3.12 \| ubuntu \| unit tests	14m 30s
merge-test-artifacts	2s
	2h 53m 40s

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