[yaml] add FileIO docs #30937

Job	Run time
Build python source distribution	50s
Check environment variables	12s
Build python cp39- wheels on auto for ubuntu-20.04	27m 12s
Prepare GCS	0s
Build python cp310- wheels on auto for ubuntu-20.04	14m 48s
Build python cp311- wheels on auto for ubuntu-20.04	22m 33s
Build python cp312- wheels on auto for ubuntu-20.04	22m 45s
Build python cp39- wheels on auto for macos-13	22s
Build python cp310- wheels on auto for macos-13	18s
Build python cp311- wheels on auto for macos-13	22s
Build python cp312- wheels on auto for macos-13	3m 1s
Build python cp39- wheels on auto for windows-latest	20s
Build python cp310- wheels on auto for windows-latest	21s
Build python cp311- wheels on auto for windows-latest	21s
Build python cp312- wheels on auto for windows-latest	6m 0s
Build python cp39- wheels on aarch64 for ubuntu-20.04	1m 38s
Upload python source distribution to GCS bucket	0s
Build python cp310- wheels on aarch64 for ubuntu-20.04	2m 40s
Build python cp311- wheels on aarch64 for ubuntu-20.04	41s
Build python cp312- wheels on aarch64 for ubuntu-20.04	1h 9m 42s
Branch repo nightly	0s
Upload wheels to GCS bucket	0s
List files on Google Cloud Storage Bucket	0s
	2h 54m 6s

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