New flow builder UI / UX concept

[nicosammito]

Currently we support the nesting of nodes inside parameters. This should no longer be possible, because there is no clever and user friendly way of creating sub paths without logical nightmare.

This results in a lot of nodes stacked on top, because there is no more way to go sideways.

Because hierarchy is also important there is currently no way to meaningfully distinguish between nodes.

References can be used across a flow and especially large flows. Its hard to keep track where a reference comes from and what type it's from.