Refactor imports in `whisper.py` and `funasr.py` to use absolute paths for `ensure_minimum_audio_duration`.

Update `moyoyo.py`: add fallback for `utils` to ensure `HParams` availability in runtime.

Refactor imports for consistency in `kokoro.py` and `processor.py`. Use absolute paths for better readability and maintainability.

Update `paths.py`: improve PROJECT_ROOT resolution with `_MEIPASS` support and enhance third-party path handling.

Rename 'src/VoiceDialogue' to 'src/voice_dialogue'.