Add example for the pandas extension types #317

Job	Run time
initialize	3s
lint (ubuntu-22.04, 3.9)	27s
build_sdist (ubuntu-22.04, 3.9)	31s
build (ubuntu-22.04, 3.8, cp38, false)	19m 46s
build (ubuntu-22.04, 3.9, cp39, false)	19m 46s
build (ubuntu-22.04, 3.10, cp310, false)	20m 43s
build (ubuntu-22.04, 3.11, cp311, false)	18m 30s
build (macos-14, 3.11, cp311, false)	22m 38s
test_sdist (ubuntu-22.04, 3.9)	54s
test (ubuntu-22.04, 3.11, false)	2m 36s
test_dependencies (ubuntu-20.04, 3.9, sqlalchemy>=2)	48s
test_dependencies (ubuntu-20.04, 3.9, sqlalchemy<2)	1m 3s
publish_release_artifacts	0s
	1h 47m 45s

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