feat(stdlib): Add `Bytes.setChar` and `Bytes.getChar` #9684

Job	Run time
Build and test on macos-latest / Dependencies / Create dependencies cache	8s
Build and test on ubuntu-latest / Dependencies / Create dependencies cache	7s
Build and test on windows-latest / Dependencies / Create dependencies cache	18s
Build and test on macos-latest / (native) Build and test / (native) Build and test	5m 10s
Build and test on macos-latest / (js) Build and test / (js) Build and test	27m 21s
Build and test on ubuntu-latest / (js) Build and test / (js) Build and test	13m 23s
Build and test on ubuntu-latest / (native) Build and test / (native) Build and test	5m 18s
Build and test on windows-latest / (native) Build and test / (native) Build and test	13m 59s
Build and test on windows-latest / (js) Build and test / (js) Build and test	18m 3s
Test pkg binaries / Test pkg binary on ubuntu-latest	54s
Test pkg binaries / Test pkg binary on macos-latest	1m 19s
Test pkg binaries / Test pkg binary on windows-latest	26s
	1h 26m 26s

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