[FEATURE REQUEST] Pretty print for architecture of network

[LdDl]

Is your feature request related to a problem? Please describe.
It would be cool to have pretty print for network's architecture

Describe the solution you'd like and provide pseudocode examples if you can
See ref. https://graphviz.org
I haven't dived into graphviz stuff yet
Prepare text-based, which can be used on any Graphviz web-viewers.

Describe alternatives you've considered and provide pseudocode examples if you can
nope

Additional context
There are plenty of web-viewers to prepare pdf/png/svg images from graphivz text-based format.
So it could be easier to work on docs and examples.

[LdDl]

Done via #7, but could be refactored due convolutional layer