Add support for Cookie Parameter style

[baywet]

Update the ParameterStyle enum to have a new "Cookie" style entry.

https://spec.openapis.org/oas/latest#parameter-style

The serialization/deserialization should already work automatically, but should be tested.

When serializing to earlier versions, an exception should be thrown since that new value cannot be represented in a valid specification.

Additionally, we should ensure serialization/deserialization handles the conditional defaults for the parameter style (depends on the in property). And does NOT emit the property when the value matches the conditional default to avoid redundancy.