v0.6.0-rc37

Fix Claude Code backend initialization and CLI usage

- Remove SDK import logic to fix ClaudeCodeOptions constructor error
- Use CLI-only approach with proper argument handling
- Add --max-turns argument with default value of 100
- Ensure multiline prompts are handled safely via spawn()
- Update package version to 1.0.4

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>