Rework documentation

[romanzaycev]

Currently, the documentation for the classes of interop component is not very easy to learn.

We need to:

• move Markdown files of documentation to a separate docs/ directory;
• separate the description of each class into a separate Markdown file;
• make a link to the documentation section from the root README.

[jchansen925]

@romanzaycev

Please assign this to me. I can begin this once the Ton issue is complete.

Thanks,

John