`@lute/process`: implement stdin support for default and inherit stdio kinds. #3611

Job	Run time
lute-check	3m 18s
lute-lint	3m 8s
build-docs-site	2m 55s
check-format	9s
run-lute-cxx-unittests (ubuntu-latest, --c-compiler clang --cxx-compiler clang++ --enable-sanitiz...	3m 50s
run-lute-cxx-unittests (windows-latest, --c-compiler cl.exe --cxx-compiler cl.exe)	4m 47s
run-lutecli-luau-tests (ubuntu-latest, --c-compiler gcc --cxx-compiler g++ --enable-sanitizers, p...	5m 48s
run-lutecli-luau-tests (macos-latest, --enable-sanitizers, all)	3m 42s
run-lutecli-luau-tests (windows-latest, --c-compiler cl.exe --cxx-compiler cl.exe, all)	4m 17s
run-lute-cxx-unittests (ubuntu-latest, --c-compiler gcc --cxx-compiler g++ --enable-sanitizers)	4m 23s
run-lutecli-luau-tests (ubuntu-latest, --c-compiler clang --cxx-compiler clang++ --enable-sanitiz...	5m 19s
run-lute-cxx-unittests (macos-latest, --enable-sanitizers)	3m 54s
run-lutecli-luau-tests (ubuntu-latest, --c-compiler clang --cxx-compiler clang++ --enable-sanitiz...	5s
run-lutecli-luau-tests (ubuntu-latest, --c-compiler gcc --cxx-compiler g++ --enable-sanitizers, t...	4s
Gated Commits	4s
	45m 43s

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