feat: enhance verbose logging in WhisperKit CLI (#335)

* feat: enhance verbose logging in WhisperKit CLI

- Add detailed transcription process logging throughout the workflow
- Show real-time progress bar with elapsed time and time remaining
- Display model initialization timings (encoder, decoder, tokenizer load times)
- Log decoding options configuration details
- Show transcription performance metrics (tokens/sec, real-time factor, speed factor)
- Add verbose logging for file paths, task selection, and report generation
- Improve error messaging with file path information

* feedback addressed

* fix tests