Add example \ support for embedded files

[scriptdealer]

Hi, I'm trying to serve embedded yaml file, but this is not possible ?
Can't see any example or intuitively clear way to do so.

[fredbi]

This is an interesting use case.

It looks like that is not possible to load directly this as a file at the moment, since the current loaders use os.ReadFile for local files.

There are in my view 2 ways to work this out:

1. Define a custom loader (e.g. with NewDoucLoaderWithMatch()" that uses a somewhat modified version of swag.LoadFromFileOrHTTP (this is where os.ReadFile is used), then add it to the spec load with "WithDocLoader(myLoader)" as a LoadOption.
2. Serve the embedded file locally then to use the loader as a http loader to that local server.