Allow a connected edge to be reconnected to another node

[mikekamminga]

https://reactflow.dev/examples/edges/updatable-edge

Context: https://tokens-studio.slack.com/archives/C05CFNASJC8/p1719223171998899
It would be awesome to be able to rewire a thread. Say for example a Geometric Series: I connected a value to 'precision' but wanted to wire it to 'Ratio'. Now I have to delete the thread and reconnect it to 'Ratio'. Instead it would be easier to reconnect the existing wire. That would mean the existing value needs a fallback. Easiest would be to keep the value it got from the prior thread. But I'll leave that up to you guys.