docs: add comprehensive setup and usage documentation

- Add a Traditional Chinese README file
- Include installation instructions for macOS and Windows
- Provide setup instructions for OpenAI API key
- Detail configuration options and examples for various providers (Azure, Gemini, Groq, Ollama, OpenRouter)
- Explain CLI mode for generating commit messages and code reviews
- Describe Git hook integration for commit message generation
- Add examples for custom commit message templates and variables
- Include code review functionality and translation options
- Provide testing command and star history chart
- Reference OpenAI Chat completions and APIs documentation

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

Author: appleboy