Allow Blob URL paths in NSwagStudio

[fdellasoppa]

Is your feature request related to a problem? Please describe.
I'm generating a TypeScript client from a Python LiteStart/Uvicorn OpenAPI definition. The schema is accessible through a blob url path. Ex: blob:http://localhost:8000/c189738f-edb3-4e86-87ce-06a9b4842077

NSwagStudio field validation does not allow such a url path so I have to download the specification and copy/paste into the app which is cumbersome.

Describe the solution you'd like

Modify the "Specification URL" validation to allow such blob paths.

Describe alternatives you've considered

Download file and copy paste content.

Additional context

N/A