fix(ext/node): wake event loop on Windows TTY write to flush prompt
When a write is queued to a TTY handle on Windows, the deferred write
callback was not processed until something else woke the event loop
(e.g. console input). This caused inquirer-style prompts to not
render until the user pressed a key.
Add UvLoopInner::wake() and call it from ensure_tty_registered on
Windows so the event loop re-polls promptly after a write is queued,
flushing the write callback and allowing the JS layer to render the
prompt UI.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>