feat: visualize runs... <- (add colouring to edges)

[doc-han]

Description

This is a POC to add some colouring to edges when visualizing runs on the canvas.

Closes #__

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[josephjclark]

Some problems with this approach:

• We don't really know whether an edge ran or not. In the screenshot above, that red edge didn't actually trigger
• That information doesn't exist at all
• What colour is an edge if it's a condition, rather than on fail?

We can't really do this until we get more information OpenFn/kit#956