Fix portable termios initialization

[sdairs]

Summary

• replace the manual \ initializer with a zero-initialized value before calling \
• avoid platform-specific struct field mismatches such as missing \ during builds

Verification

• cargo build
• cargo test

[Copilot]

Pull request overview

Improves portability of terminal raw-mode setup by avoiding manual libc::termios field-by-field initialization, which can fail to compile on platforms where the struct layout differs.

Changes:

• Replace manual libc::termios { ... } construction with a generic zero-initialized libc::termios prior to calling tcgetattr.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

You can also share your feedback on Copilot code review. Take the survey.