Support nested schema inside object properties

Nobody has claimed this yet.

Hi. Maybe I missed, I'm trying to nest a schema to object type `properties`, but I couldn't found the way to solve this situation.

``` yaml
responses:
200:
content:
application/json:
schema:
type: object
properties:
addressInfo:
$ref: "#/components/schemas/AddressInfo"
description: Address info.
```

First I wrote below, but it doesn't work.

``` yaml
schema:
type: object
properties:
addressInfo:
$ref: AddressInfo
description: Address info.
```

This is one of options, but it can't declare `description`

``` yaml
schema:
type: object
properties:
addressInfo: AddressInfo
# description?
```

manual binding is not working because **AddressInfo** is not in **#/components/schema**

``` yaml
schema:
type: object
properties:
addressInfo:
$ref: "#/components/schemas/AddressInfo" # not defined.
description: Address info.
```

Is there a proper solution for this? 🙏 Thanks.

Start by tracing how the YAML response schema, object properties, and #/components/schemas references are represented and resolved. Check whether the current OpenAPI generation path supports a referenced nested schema with a property description; done means producing valid output for the AddressInfo example while preserving the nested reference and description, with coverage for this case.

Written by the indexing model from the issue text.