[Feature]: Add support example/examples on BodyRequest object

[thaichat04]

Spec Open API on BodyRequest: https://swagger.io/specification/#parameter-object with example/examples

Add information about example/examples found on content into result

These information are optionals, even with 'schema' attribut on BodyRequest. Current code make 'schema' is required

[manchenkoff]

Closed by #87, published as v1.1.18