Simplify data for language messages.

Trying to customize request objects trigger typescript errors.

Remove inflection dependency.

Organize code even further to improve extensibility.

Use more compact data structures for content negoatiation.

Provide utility types for resource schema validation.

Also handle each step for POST and PUT handlers.

Properly return data updated from data source.

Respect content negotiation.

Set permissions per resource.

Add content negotiation for encodings.

Include examples for running the package.