Add blockchain-specific debug visualizations pane

[JoshuaBatty]

Tools like debugger in tenderly have features like viewing execution traces and gas profiling visualisations that go beyond the scope of what we can do simply with the debug adaptor protocol.

We should look into writing a custom UI panel in VScode that can add some of this extra functionality so we can help users visualise blockchain specific information that would be useful during a dev / debugging session.

The MVP probably should just show the execution trace of a transaction. Would be cool if when you clicked on a step in the transaction if the corresponding code showed up in the editor.