chore(server): Add ServerIoStream type #3736

Job	Run time
clippy	57s
cargo-deny check	23s
check-external-types	1m 1s
check (ubuntu-latest)	3m 27s
codegen	32s
check (macOS-latest)	3m 49s
Interop Tests (ubuntu-latest)	46s
check (windows-latest)	6m 8s
Check MSRV	1m 17s
Interop Tests (macOS-latest)	49s
rustfmt	14s
Interop Tests (windows-latest)	3m 37s
semver	1m 9s
test (ubuntu-latest)	4m 4s
Check unused dependencies	4m 41s
test (macOS-latest)	3m 46s
test (windows-latest)	6m 25s
	43m 5s

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