Add support for Ket format save/load while aromatize/dearomatize calls

[AlexanderSavelyev]

Background Ketcher should interact with Indigo using Ket format. The generic functions should not change the existing objects on canvas.

Acceptance criteria: Aromatize and dearomatize methods should work for Ket format and make the updates to the bond types All the changes should be saved into the Ket format All the existing Ket features (simple objects, CIP properties, etc) should be kept without changes