wasm repl: panics/crashing still displays "normal" output

[JRMurr]

Found during #6062

If you run code that causes a panic (like div by 0) you see the panic output but a nonsense answer below

Similar behavior happens for a function that calls crash

I can see the argument that showing the type sig would be nice so might be worth to keep that still

[folkertdev]

it also isn't great with the native repl

» 1 / 0
This Roc code crashed with: "Decimal division by 0!"

<function> : Frac *

much of the code is shared between them so I guess that makes sense. Needs improvement!