feat: 添加配置示例文件，包含多种模型和参数设置

config.example.json

@@ -0,0 +1,62 @@
+{
+    "last_interface_format": "OpenAI",
+    "last_embedding_interface_format": "OpenAI",
+    "llm_configs": {
+        "DeepSeek V3": {
+            "api_key": "",
+            "base_url": "https://api.deepseek.com/v1",
+            "model_name": "deepseek-chat",
+            "temperature": 0.7,
+            "max_tokens": 8192,
+            "timeout": 600,
+            "interface_format": "OpenAI"
+        },
+        "GPT 5": {
+            "api_key": "",
+            "base_url": "https://api.openai.com/v1",
+            "model_name": "gpt-5",
+            "temperature": 0.7,
+            "max_tokens": 32768,
+            "timeout": 600,
+            "interface_format": "OpenAI"
+        },
+        "Gemini 2.5 Pro": {
+            "api_key": "",
+            "base_url": "https://generativelanguage.googleapis.com/v1beta/openai",
+            "model_name": "gemini-2.5-pro",
+            "temperature": 0.7,
+            "max_tokens": 32768,
+            "timeout": 600,
+            "interface_format": "OpenAI"
+        }
+    },
+    "embedding_configs": {
+        "OpenAI": {
+            "api_key": "",
+            "base_url": "https://api.openai.com/v1",
+            "model_name": "text-embedding-ada-002",
+            "retrieval_k": 4,
+            "interface_format": "OpenAI"
+        }
+    },
+    "other_params": {
+        "topic": "",
+        "genre": "",
+        "num_chapters": 0,
+        "word_number": 0,
+        "filepath": "",
+        "chapter_num": "120",
+        "user_guidance": "",
+        "characters_involved": "",
+        "key_items": "",
+        "scene_location": "",
+        "time_constraint": ""
+    },
+    "choose_configs": {
+        "prompt_draft_llm": "DeepSeek V3",
+        "chapter_outline_llm": "DeepSeek V3",
+        "architecture_llm": "Gemini 2.5 Pro",
+        "final_chapter_llm": "GPT 5",
+        "consistency_review_llm": "DeepSeek V3"
+    }
+}