Display molecules in macro mode: basic structures with atoms and bonds

[rrodionov91]

Background
Currently molecules are displayed same as chems in macromolecules mode. Structure of molecule is not clear until user hover it to see preview.

Solution
It needs to display molecules in macro mode in similar view as in molecules mode. Task covers basic structures only to simplify the first iteration. It includes next list of features:

• Bonds. Single, Double, Single Up and Single Down types of bonds should be implemented. Lines of double bonds should not overlap each other on any angle (same as implemented for double bond in molecules mode now).
• Atoms. Only single atoms are in scope. Carbon atom should not be displayed. Hydrogen label should be placed after/before atom label with number subscript which in case if atom has valence more than connections. Valence validation errors are out of scope. Charge is out of scope.
• Connections. It should be possible to establish connection between monomer and molecule in macromolecules mode by drawing the bond between monomer and molecule's attachment point, created in molecules mode.
• User settings. Applying user settings are out of scope.
• All other entities( sgroups, rgroups, rgroup attachment points, e.t.c) are out of scope.

[AlexeyGirin]

Verified with issues.

• Ketcher Version 2.26.0-rc.1 Build at 2024-10-04; 18:45:04
• Indigo Toolkit Version 1.25.0-rc.1.0-g704673fcb-wasm32-wasm-clang-19.0.0
• Chrome Version 129.0.6668.90 (Official Build) (64-bit)
• Win10