Feature/migrate to project structure

[miroslavpojer]

Release Notes:

• Refactored repository structure.

[tmikula-dev]

I think, that since I do give you some input in every situation (I add "N/A") You do not need to have a NOT_AVAILABLE part.

[tmikula-dev]

I do like this structure much more! Good first phase of getting this project back to our standard.

• I still want to suggest to put the security and shared folders inside new src/. Better for mirroring unit test folder against the src. Right now you are not testing the shared folder logic at all.
• You are having at the moment two workflow files. I had to read the documentation to find out, that the one inside the security is just example caller. I am suggesting to move this examples inside the docs/security/security.md + docs/security/example_workflows/