* refactoring http request creation and sending
* fix lint error
* increase the test coverage of client.go
* refactor: Change the style of HTTPRequestBuilder.Build func to one-argument-per-line.
* 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
* feat(models): include flow for azure openai endpoint
* feat(models): include flow for azure openai endpoint
* feat(models): include flow for azure openai endpoint
* chore(fullURL): update logic to run in fullURL function
* chore(fullURL): update based on pr comments to use c.config.APIVersion
* 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
* add form builder
* cover VariImage
* test for closing errors
* simplify tests
* add audio api test coverage
* don't leak authToken when printed
* rename api->client
* fix test