AsrOutputs + Wordcab to RTTM

[chainyo]

✨ Features

• Adds ASROutput for each ASR provider to manipulate transcription outputs easily.
• Rename everything from benchmark to transcription for clarity.
• Update the _save_result method to _save_results to also handle rttm file save.
• Add result_to_rttm for Wordcab.
• Add transcription data samples for all implemented ASR providers.

🔗 Linked Issue/s

29

🧪 Tests

• [ ] Did you implement unit tests if required?

No tests were added, only local testing.