tty: add raw-vt and io raw modes#64140
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Adds string raw-mode selection to
tty.ReadStream#setRawMode():setRawMode(true)keeps the existing behavior.setRawMode('raw-vt')explicitly selects the existing Node raw mode backed by libuvUV_TTY_MODE_RAW_VT.setRawMode('io')selects libuvUV_TTY_MODE_IOfor binary-safe I/O mode on Unix.readStream.rawModeexposes the exact current mode whilereadStream.isRawremains boolean for compatibility.This is intended to address the output-processing distinction discussed in #63059 and follows libuv's existing
UV_TTY_MODE_IOsemantics. It preserves the currentsetRawMode(true)behavior instead of changing it.Refs: #63059
Refs: libuv/libuv#32
Local verification:
git diff --checkpasses.build-script-buildexecutables as untrusted on this machine; relying on CI for the native build and pseudo-tty test run.