Add Readme example to example_test.go (#298)

* 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

* Migrated examples to example_test.go

* Add some executable examples

* Update error docs

* Avoid linting example files which break conventions

* Restore README examples

* Enable linting for example_test

README.md

@@ -485,4 +485,5 @@ if errors.As(err, &e) {
 ```
 </details>
 
+See the `examples/` folder for more.