implement Core file structure

[arhimede]

Feature Request

In order to be prepared for integaration in various systems

Q	A
New Feature	yes
RFC	no
BC Break	no

Summary

example:
https://github.com/dotkernel/api/tree/6.0/src

[arhimede]

Like this one
https://docs.dotkernel.org/api-documentation/v6/extended-features/handler-structure/

like in API and ADMIN