Enhance voice configuration with idle prompt features and new TTS settings

- Added idle prompt timeout, maximum count, and text to multiple voice configuration files to improve user interaction during idle periods.
- Updated greeting mode to 'fastgpt_opener' in relevant configurations for a more dynamic greeting experience.
- Introduced a new voice configuration file for xfyun TTS, including detailed service settings and parameters.
- Refactored the pipeline to handle idle prompts and user turn events, ensuring smoother interaction flow.
- Adjusted the VAD and turn configurations to accommodate new idle prompt features.

config/voice-fastgpt-state-xfyunTTS.json

@@ -0,0 +1,99 @@
+{
+  "server": {
+    "host": "0.0.0.0",
+    "port": 8000,
+    "cors_origins": ["*"]
+  },
+  "audio": {
+    "sample_rate_hz": 16000,
+    "channels": 1,
+    "frame_ms": 20
+  },
+  "session": {
+    "inactivity_timeout_sec": 60
+  },
+  "turn": {
+    "vad": {
+      "confidence": 0.8,
+      "start_secs": 0.4,
+      "stop_secs": 0.2,
+      "min_volume": 0.8
+    },
+    "interruption_min_chars": 3,
+    "interruption_use_interim": true,
+    "interruption_short_replies": [
+      "是",
+      "是的",
+      "对",
+      "对的",
+      "嗯",
+      "好",
+      "好的",
+      "行",
+      "可以",
+      "没问题",
+      "不是",
+      "不",
+      "不行",
+      "不用",
+      "不要",
+      "没有",
+      "否",
+      "你好",
+      "在吗"
+    ],
+    "user_speech_timeout_sec": 0.2,
+    "idle_prompt_timeout_sec": 3.0,
+    "idle_prompt_max_count": 3,
+    "idle_prompt_text": "你好，请问还在吗？"
+  },
+  "agent": {
+    "greeting_mode": "fastgpt_opener",
+    "response_state": {
+      "enabled": true,
+      "tag": "state",
+      "event_type": "response.state",
+      "max_prefix_chars": 256
+    }
+  },
+  "services": {
+    "stt": {
+      "provider": "xfyun",
+      "app_id": "416ce125",
+      "api_key": "c65342fe603126c3610031d8429bb36d",
+      "api_secret": "MzkyYmI5OWEyODQzN2FiN2VhN2UzYzU4",
+      "base_url": "wss://iat-api.xfyun.cn/v2/iat",
+      "language": "zh_cn",
+      "domain": "iat",
+      "accent": "mandarin",
+      "encoding": "raw",
+      "frame_size": 1280,
+      "timeout_sec": 10.0
+    },
+    "llm": {
+      "provider": "fastgpt",
+      "api_key": "fastgpt-zlLjYtWZWN0uhQHs3ZOFHG4KLGMIdr2CkbZLCSfqGm5vcdx5xIZbp",
+      "base_url": "http://localhost:3030",
+      "model": "my-voice-app",
+      "app_id": "691eddaa53e3f8d9f25f1370",
+      "chat_id": null,
+      "variables": {},
+      "detail": false,
+      "timeout_sec": 60.0
+    },
+    "tts": {
+      "provider": "xfyun",
+      "app_id": "416ce125",
+      "api_key": "c65342fe603126c3610031d8429bb36d",
+      "api_secret": "MzkyYmI5OWEyODQzN2FiN2VhN2UzYzU4",
+      "base_url": "wss://tts-api.xfyun.cn/v2/tts",
+      "voice": "x4_xiaoyan",
+      "aue": "raw",
+      "tte": "UTF8",
+      "speed": 50,
+      "volume": 50,
+      "pitch": 50,
+      "source_sample_rate_hz": 16000
+    }
+  }
+}