- Implement DateUtils for handling date operations with timezone support.
- Add unit tests for DateUtils to ensure functionality and edge cases.
- Create StringUtils for string manipulation with a fluent API.
- Include unit tests for StringUtils covering various string operations.
- Introduce EncryptionUtils for secure data encryption and decryption.
- Add tests for EncryptionUtils to validate encryption and decryption processes.
- Update index.ts to export new utility modules.
- Introduce encryption key management with a dedicated key file.
