Fork new project

I think the abstraction of `riteraft` is not suitable for our use case (leader, follower creation API), so it would be better to fork from it and create a new project.

I propose creating a separate project that has a new interface, while leaving riteraft-py as a minimal example code to test and directly use `rraft-py` through CLI.

The reason for creating a separate project instead of just renaming `riteraft-py` is to avoid confusion caused by `riteraft-py` and `riteraft` offering completely different APIs.

Also, to implement the remaining features, considerable changes in code and interfaces will be necessary, which would deviate from riteraft's goal of being a "minimal example."