更新环境变量配置，调整模型名称获取方式，新增Dify API相关配置，删除无用的脚本文件，优化意图识别逻辑，添加LLM提取词条逻辑

rag2_0/dify/DifyCompareTest.py

@@ -84,7 +84,7 @@ class DifyComparisonTester:
     def get_llm(self, **kwargs):
         api_key = os.getenv("OPENAI_API_KEY")
         base_url = os.getenv("OPENAI_API_BASE")
-        model = os.getenv("LLM_MODEL_NAME")
+        model = os.getenv("MODEL_NAME")
         return OpenAiLLM(api_key=api_key, base_url=base_url, model=model, **kwargs)
 
     def find_wiki_link(self, row) -> str | None: