Split `State` into `StateOpen` and `StateAccept` #8173

Job	Run time
Lints and doc tests on ubuntu-latest	1m 3s
Lints and doc tests on windows-latest	3m 39s
Typos Check	7s
Unit tests on ubuntu-latest	6m 21s
Lints and doc tests on macos-13	2m 30s
Unit tests on windows-latest	7m 20s
Lints and doc tests on macos-14	1m 6s
Unit tests on macos-13	7m 22s
Unit tests on macos-14	7m 49s
Memory leak checks	0s
CI status checks	1s
	37m 18s

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