UI representations/customization

[DivadNojnarg]

So far, we built blockr with a "card-like" structure: a block is a card, stack is a card... A downside we quickly realise is the space taken by all of these UI elements in a much larger project, like a workspace.

We could consider building other UI representations like networked-based (visNetwork, igraph, ...), that are much more compact. Ideally, we could have helper functions to help building these kind of representations.