Allow connection of molecule with monomer

[rrodionov91]

Background
Functionality of attachment points addition for molecules will be implemented in ticket: #4530
After that connections between molecules and monomers in macromolecules mode will be enabled. It needs to implement different serialization rules for such connections.

Solution

1. Connections between molecules and monomers should be serialized/deserialized to ket with such structure:

// Connection
{
    "connectionType": "single",
    "endpoint1": {
        "monomerId": "monomer14",
        "attachmentPointId": "R2"
    },
    "endpoint2": {
        "moleculeId": "mol0",
        "atomId": "2"
    }
},

2. Such connections should be displayed as connection between monomers in macromolecules mode and connection between sgroup and atom of molecule in molecules mode.

Macromolecules mode:

Molecules mode:

[AlexeyGirin]

Rules of Center to Center connection? - Same as for CHEM

[Zhirnoff]

Tested.
Desktop:

• OS: Windows 11
• Browser Chrome
• Version 124.0.6367.79 (Official Build) (64-bit)

Ketcher version
[Version 2.22.0-rc.2]