* Support Retrieve model API (#340)
* Test for GetModel error cases. (#340)
* Reduce the cognitive complexity of TestClientReturnsRequestBuilderErrors (#340)
* maintain underlying error structs to allow for type conversion and
defensive error checking
* allow Error.Is for Azure responses
* update readme, add tests to ensure type conversion
* fix whitespacing
* read me
* add import to readme example
* Add speech to text example in docs
* Add caption formats for audio transcription
* Add caption example to README
* Address sanity check errors
* Add tests for decodeResponse
* Use typechecker for audio response format
* Decoding response refactors