Update static file routing and root endpoint for frontend integration

Add robust lifecycle management for `audio_player` service in system routes

Standardize service lifecycle management by replacing `stop` with `exit` and introducing `is_exited` check

Remove `voice_schemas.py` and refactor schema imports for TTS and ASR modules in `__init__.py`

Refactor speech recognizer, audio capture, and system routes for improved clarity and functionality

Add pause and resume functionality to voice dialogue system

Refactor project: split `main.py` functionality into modular components under `cli`, `core`, and `config`.

Increase service startup timeouts and set daemon mode for services.

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