Show errors within interface

[delaneyj]

Is your feature request related to a problem? Please describe.
So I'm just starting to dig into OpenRPC. Love the playground (especially the VSCode extension). It would be really helpful if there was some kind of on screen error notification when your openschema.json isn't valid.

Describe the solution you'd like
From a red bar that shows the contents of the console.log output to a full descriptive overlay ala

Really anything would be a great start

Describe alternatives you've considered
I was able to find the issue via chromdevtools but that's not as accessible in the extensions

Additional context
Excited to continue to explore the spec!

[amin1419]

Confirm

[BelfordZ]

Thanks for writing up this issue. This is top of mind, lets get this resolved ASAP.