[🐛 Bug] openapi preview does not work for v0-sdk

[zdunecki]

Openapi via xyd dev <openapi> does not work for v0-sdk.

as xyd preview does not support .json it must be transformed to yaml

[zealgoswami-lab]

Can you please add some context about this issue with following point.

1. what is actual requirement
2. what is v0_sdak
3. what should be expected behavior
4. what is purpose of this task

[zdunecki]

1. One of the abilities of xyd is serving OpenAPI Specification. You can find out implementation here. It's transformed into unitform a common interface for displaying API-like structures for all supported interfaces: OpenAPI/GraphQL/TypeScript/React.
   
   If some specs crashes (like v0-sdk) it means that xyd does not respect that well. Maybe there's a case something is null and we do not handle that or there's something we do not support yet (detailed OpenAPI spec requirements we do not respect).

2. v0-sdk is SDK for the v0 Platform API powered by Vercel. I just found use case where xyd does not serve OpenAPI well. In this case it crashes.

3. First of all it should not crash. It's the fist requirement. The second is check if xyd uniform looks well againts v0-sdk OpenAPI spec. What it does mean? All fields we can read from OpenAPI Spec should be available for xyd.

4. First of all do not crash (mandatory). Second, check if format is well written to xyd. If not then it depends on your involve - you can make xyd OpenAPI converter better supported or just write comment here on GitHub what's missing. But the most important is not crashing.