Documentation Enhancements:

1. **Added Crate Badges**:
   - Added crates.io version badge for visibility
   - Added docs.rs documentation badge pointing to latest version
   - Added to both English and Chinese READMEs

2. **Library Mode Documentation**:
   - Added new "Library Mode Integration" section in both languages
   - Provides clear instructions for embedding rmqtt as a Rust dependency
   - Includes example Cargo.toml dependency configuration
   - Links to detailed library documentation in rmqtt/README.md

3. **Bilingual Support**:
   - English version: "Library Mode Integration"
   - Chinese version: "通过库方式集成" (Library Mode Integration)
   - Consistent structure and information across both languages

Benefits:
- **Better Discoverability**: Developers can easily find the crate on crates.io
- **Improved Documentation Access**: Direct link to latest API documentation
- **Enhanced Integration Options**: Clear guidance for using rmqtt as a library
- **Multilingual Support**: Consistent information for both English and Chinese users

The changes make it easier for developers to discover, integrate, and use rmqtt in various deployment scenarios.