implement json viewer/editor

[sharno]

The editor should support collapsible properties in the json. The response viewer can stay non editable but the text should be selectable.

The request editor is editable. The json should have real time validation for valid json and it should show some kind of warning and maybe squiggly line under invalid parts. And the properties collapsible

The warning can be displayed right under the json editor

[omar-s-ta]

Hi @sharno ,

I did not find any PR covering this, and from the code in main I believe it is not covered yet. I'll take care of it.

I know the issue title is clear, but if you can, please update the description in to avoid assuming anything.

Thanks!

[sharno]

Updated. You don't have to do it all in one PR. Feel free to split it up if you'd like