(aws-iot): Support for Thing Groups and Thing Types

### Description

Support for IoT thing groups and thing types in the CDK.

### Use Case

To provision thing groups and thing types in our environment with IaC.

### Proposed Solution

Implement APIs to create the aforementioned resources.

### Other information

_No response_

### Acknowledge

- [ ] I may be able to implement this feature request
- [ ] This feature might incur a breaking change

No files or tests are identified in the issue. Start by reviewing the CDK's existing AWS IoT resource patterns and the AWS IoT APIs for thing groups and thing types; done means exposing APIs that provision both resource types for infrastructure as code.

Written by the indexing model from the issue text.