Add practical examples and documentation for PyIceberg #8346

Job	Run time
integration-test-gcs	6m 56s
integration-test-adls	7m 16s
integration-test	17m 29s
integration-test-s3	7m 4s
lint-and-unit-test (3.13)	2m 59s
lint-and-unit-test (3.10)	3m 10s
lint-and-unit-test (3.11)	3m 9s
cibw-dev-env-smoke-test	34s
lint-and-unit-test (3.12)	8m 32s
integration-coverage-report	37s
	57m 46s

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