Separate Y-Files visualization module as a separate internal library

[avpotapov00]

Currently, the Lincheck and Visual Debugger plugins use the same copy-paste code.
Let's extract the common visualization part as a separate internal library.

Approximate estimated time: 7-10 full-time days.

Implementation notes: the library should provide extension points to allow further development of the Visual Debugger. These extension points should be organized like a chain of processors, each of them can add some items to the result graph.