AsyncAPI Schema object deserializer is missing some properties

[crudbee]

Describe the bug

Schema deserializer AsyncApiSchemaDeserializer.cs is missing some fixed fields compared to the AsyncAPI specification.

In particular:

patternProperties 
additionalItems 
propertyNames

Additional context

Similar PR's touching the same code #120 and #121

[github-actions]

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[VisualBean]

additionalItems and items looks to be the same property, but according to spec 2.6 we should support both.
https://json-schema.org/understanding-json-schema/reference/array.html
https://www.asyncapi.com/docs/reference/specification/v2.6.0

It also looks like its another one of those 'bool' or 'object' types of things.

For the others as a reference for later
https://json-schema.org/understanding-json-schema/reference/object.html#pattern-properties
https://json-schema.org/understanding-json-schema/reference/object.html#property-names