feat(operate): 添加实体类型配置并优化提示生成

- 在全局配置中添加 entity_types 参数，用于自定义实体类型
- 在生成实体提取和关系提取的提示时，使用配置的实体类型替代默认值
- 优化了提示生成逻辑，提高了代码的可配置性和灵活性

lightrag/operate.py

@@ -260,6 +260,9 @@ async def extract_entities(
     language = global_config["addon_params"].get(
         "language", PROMPTS["DEFAULT_LANGUAGE"]
     )
+    entity_types = global_config["addon_params"].get(
+        "entity_types", PROMPTS["DEFAULT_ENTITY_TYPES"]
+    )
     example_number = global_config["addon_params"].get("example_number", None)
     if example_number and example_number < len(PROMPTS["entity_extraction_examples"]):
         examples = "\n".join(
@@ -272,7 +275,7 @@ async def extract_entities(
         tuple_delimiter=PROMPTS["DEFAULT_TUPLE_DELIMITER"],
         record_delimiter=PROMPTS["DEFAULT_RECORD_DELIMITER"],
         completion_delimiter=PROMPTS["DEFAULT_COMPLETION_DELIMITER"],
-        entity_types=",".join(PROMPTS["DEFAULT_ENTITY_TYPES"]),
+        entity_types=",".join(entity_types),
         language=language,
     )
     # add example's format
@@ -283,7 +286,7 @@ async def extract_entities(
         tuple_delimiter=PROMPTS["DEFAULT_TUPLE_DELIMITER"],
         record_delimiter=PROMPTS["DEFAULT_RECORD_DELIMITER"],
         completion_delimiter=PROMPTS["DEFAULT_COMPLETION_DELIMITER"],
-        entity_types=",".join(PROMPTS["DEFAULT_ENTITY_TYPES"]),
+        entity_types=",".join(entity_types),
         examples=examples,
         language=language,
     )