Add option to register custom class serializers

### Use case
Want to insert data structured as List> without having to covert every row to a dto object and provide getters.
This kind of structure typically comes from query resultset, csv parser, apache camel exchange etc. The map is of column name to value.

### Describe the solution you'd like
Be able to register a class serializer for Map with POJOSerializers which calls Map.get("column") with the appropriate cast.
Alternatively add built in serializer option that handles List> type
Or possibly have the register method detect get(column-name) methods as valid serialization methods

also allow java record getter methods (which don't start with "get") to act as serialization methods