fix(cli): use CON device instead of /dev/tty on Windows

[hashbender]

What does this PR do?

Fix a Windows-specific compatibility issue where _reset_terminal_input_modes_on_exit() fails with FileNotFoundError because Windows doesn't have /dev/tty device.

Related Issue

This is a split from PR NousResearch#54933 (closed). The local.py changes were identified as duplicates of NousResearch#49460 and NousResearch#54235, but this cli.py fix is independent and not covered by those PRs.

Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)

Changes Made

• cli.py (line ~1176): Added platform check in _reset_terminal_input_modes_on_exit() to use CON device on Windows instead of /dev/tty

How to Test

1. On Windows 11, redirect stdout and exit TUI
2. Verify no FileNotFoundError is raised
3. Verify terminal state is properly reset after Hermes exits
4. Verify /dev/tty still works on Linux/macOS

Checklist

Code

• I've read the [Contributing Guide](https://github.com/NousResearch/hermes-agent/blob/main/CONTRIBUTING.md)
• My commit messages follow [Conventional Commits](https://www.conventionalcommits.org/) (fix(scope):, feat(scope):, etc.)
• I searched for [existing PRs](https://github.com/NousResearch/hermes-agent/pulls) to make sure this isn't a duplicate
• My PR contains only changes related to this fix/feature (no unrelated commits)
• I've run pytest tests/ -q and all tests pass (Note: Full test suite not run due to environment limitations)
• I've added tests for my changes (Note: Manual testing performed on Windows 11)
• I've tested on my platform: Windows 11

Documentation & Housekeeping

• I've updated relevant documentation — or N/A
• I've updated cli-config.yaml.example if I added/changed config keys — or N/A
• I've updated CONTRIBUTING.md or AGENTS.md if I changed architecture or workflows — or N/A
• I've considered cross-platform impact (Windows, macOS) per the [compatibility guide](https://github.com/NousResearch/hermes-agent/blob/main/CONTRIBUTING.md#cross-platform-compatibility)
• I've updated tool descriptions/schemas if I changed tool behavior — or N/A

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Note: Part of this code was AI-assisted, reviewed and tested by human.

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Mirror-of: NousResearch#56722
NousResearch#56722