feat: basic RNTuple writing #4208

Job	Run time
pyodide-build	1m 55s
build (windows-latest, 3.9)	27m 55s
build (windows-latest, 3.10)	28m 20s
vanilla-build (windows-latest, 3.13)	25m 41s
build (windows-latest, 3.11)	27m 14s
vanilla-build (ubuntu-latest, 3.13)	23m 4s
numpy1-build (windows-latest, 3.11)	23m 41s
build (windows-latest, 3.12)	26m 36s
vanilla-build (macos-latest, 3.13)	22m 24s
numpy1-build (ubuntu-latest, 3.11)	22m 21s
build (windows-latest, 3.13)	27m 13s
numpy1-build (macos-latest, 3.11)	21m 47s
build (macos-latest, 3.9)	24m 24s
build (macos-latest, 3.10)	23m 47s
build (macos-latest, 3.11)	23m 55s
build (macos-latest, 3.12)	23m 28s
build (macos-latest, 3.13)	24m 10s
build (ubuntu-latest, 3.9)	1m 40s
build (ubuntu-latest, 3.10)	24m 33s
build (ubuntu-latest, 3.11)	23m 56s
build (ubuntu-latest, 3.12)	23m 57s
build (ubuntu-latest, 3.13)	24m 15s
pass	2s
	8h 16m 18s

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