Restructure and merge circuit into zone if possible

[ml1nk]

I reworked the inheritance structure and created separate files by device. The only real change are some lines which merge the circuit into the zone if possible which was eased by this transition, a migration with fixed an inconsistency in the unique_id creation and refactoring the deprecated units.

As our work is conflicting and i probably need to redo it on the current codebase (just faster this time), i would ask if you approve this restructure?