Extend Ketcher API with a function to update monomers library

[svvald]

A new function updateMonomersLibrary has to be added to a Ketcher API. This function should accept monomers description in ket format in JSON notation.
Once this function is invoked, new monomers have to be added to the monomers library in the macromolecules mode.
If some of the provided monomers overlap with the existing ones with their type and name, new monomers have to replace the existing ones

Also additional parameter has to be provided for Editor props for customers to be able to provide additional library data on Ketcher initialization