[refactor]: need to define better type system

[wai-lin]

Problem

Currently types are defined in types.ts file. As the code base increase it'll also increase in size and it'll become maintenance hell.

Solution

I think it would be better to create types alongside with the code base like other libraries.

Tasks

• [x] create refactor-types branch
• [x] migrate and refactor types alongside with code base.

[wai-lin]

merged! #6

@mm-ninja-turtles/core-maintainers