serialize/deserialize JSON/Dict to/from smithy auto generated models

[brianrundle]

I have a smithy definition and need to be able to serialize/de-serialize JSON/Dict to/from smithy auto generated classes. But these models don't come with from_dict/to_dict methods.

The googles suggest I need to create a custom method for this conversion since I'm not using the 'client' to instantiate the classes all the time. Maybe using attr has spoiled me, but I would think to_dict/from_dict would be a default feature of the auto generated classes.

I'm digging into creating some kind of utility companion for this, but I can't help thinking I'm re-implementing something or missing something when I ran: smithy build to generate the models.

Thanks!