[ENHANCEMENT]: Project's module structure.

[Mergevos]

Describe the enhancement very clearly and detailed Let's declare a structure for our project:

- src
  - /core
  - /module1
      - /module1/code*
          - something.py
          - something_else.py
      - __init__.py

• Find appropriate name instead of code for the directory which is holding the actual code. __init__.py should contain imported code from the code dir, as well as the command, which should be declared there.

[Mergevos]

The core should be separated because it holds core of the package manager, and is needed by all modules. It doesn't follow the latter pattern.

[Mergevos]

Prefix the files with _ if they aren't used by any other module then itself (internally)