Treat Refit's IApiResponse as a monad and computation

[mark-pro]

The idea is to treat Refit's IApiResponse as a monad or monadic computation and provide conversions from IApiResponse to LanguageExt monadic types.

[mark-pro]

app.MapGet(
    "/{input}", 
    (MyRefitClient client, Input input) =>
        client.GetSomething()
        .Map(body => /*do something with body*/ body) 
        .ToResult()
).AddValidationFilter<Input>();