Add append method to ZByteWriter #7783

Job	Run time
Typos Check	4s
Lints and doc tests on ubuntu-latest	11m 3s
Unit tests on ubuntu-latest	20m 37s
Lints and doc tests on windows-latest	19m 14s
Unit tests on windows-latest	36m 28s
Lints and doc tests on macos-13	12m 34s
Unit tests on macos-13	19m 19s
Lints and doc tests on macos-14	7m 47s
Unit tests on macos-14	10m 46s
Memory leak checks	0s
CI status checks	1s
	2h 17m 53s

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