Using Swift to Rewrite Ruby source code meanwhile Refactoring with Patterns and Testing.

- Rewrite the whole Ruby source code to Swift(type-safe language) Version, and compile it to Swift Binary executable file after that.
- Refactoring with Design Patterns and Testable Architecture, add Unit Tests to increase the project stability.
  - **TBD**: May only support macOS/Linux I guess? Don't know the WindowsOS can execute Swift Binary File or not.