- Update ProcessPinyin function to support tone as a string ("mark" for tone marks, "number" for numeric tones) and add heteronym functionality for multiple pronunciations.
- Modify README.md to include examples for new tone options and heteronym mode.
- Expand unit tests to cover various configurations for tone and heteronym, ensuring comprehensive validation of Pinyin conversion scenarios.
- Introduce ProcessPinyin function to convert Chinese characters to Pinyin with customizable options for tone and separator.
- Register the new Pinyin process in the utils package for easy access.
- Add comprehensive unit tests for various Pinyin conversion scenarios to ensure accuracy and reliability.
