[SUGGESTION] Support for paste JSON/XML as classes

[callumbwhyte]

Following discussion with @arkalyanms and @webreidi at MVP Summit, one feature I feel is missing from C# Dev Kit in VS Code is the "paste JSON/XML as classes" feature from Visual Studio.

This allows you to copy a JSON or XML object, and via the "Paste Special" menu paste it as a C# class with the relevant types created / matched (See here)

It is a hugely helpful feature when creating integrations with APIs: copy sample from docs -> paste into Visual Studio -> C# class representing the object(s) automatically created.

The Visual Studio implementation is certainly not perfect, e.g. I wish it would keep properties pascal case, or automatically apply System.Text.Json serialization attributes where relevant, but it definitely speeds things up!

In VS Code I imagine this could appear in the Edit menu, or as an option on right-click when within a .cs file.

[AbhitejJohn]

Tagging @arkalyanms to put this on his radar for triage.

[arunchndr]

Starting with @mikadumont to drive design. This might need vscode side work.

[dibarbet]

Moving over to track on the C# extension side as that is where the paste handling would likely occur - dotnet/vscode-csharp#7644