New panel for stacktraces

[schickling]

When debugging a GraphQL API working with errors is a very common scenario. It would be very useful to have an additional panel for stacktraces next to the "Tracing" panel.

[morajabi]

Would like to implement this. A brief description of the ideal design for the pane would be awesome (probably with an example?).

[schickling]

I think we can draw some inspiration from tools like VSCode for the design. However, we first should do a bit of research how this would be best implemented. Is this directly supported by errors or is there a new extension needed? Maybe the new error format helps?