Create a clear summary and visualisation about the project

[syahdeini]

It is really hard for new contributor to understand the architecture and codes of the projects without spending a huge time reading the code. Therefore it would be easier if @m-rap can create a class-diagram, and probably docstring on the class, and if possible contributing.rst to help the new contributor onboard on the project.

[m-rap]

wow hello @syahdeini. that sounds like a lot of work haha. but sure i will soon update it with some docs. actually i have planned it since starting the project, but then days became weeks, weeks became months, and months became years lol!