* Added 'wav' and 'pcm' Audio Formats
Added "wav" and "pcm" audio formats as per OpenAI API documentation for createSpeech endpoint.
Ref: https://platform.openai.com/docs/api-reference/audio/createSpeech
Supported formats are mp3, opus, aac, flac, wav, and pcm.
* Removed Extra Newline for Sanity Check
* fix: run goimports to get accepted by the linter
