feat: 新增 Agent 应用核心代码

- supervisor, memory, skills 模块
- LLM 工厂

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

agent/app/agent/llm/factory.py

@@ -0,0 +1,30 @@
+"""
+LLM Factory - LLM 工厂类
+"""
+from typing import Dict, Any
+from app.agent.llm.openai import OpenAILLM
+from app.agent.llm.anthropic import AnthropicLLM
+
+
+class LLMFactory:
+    """LLM 工厂类"""
+
+    @staticmethod
+    def create(provider: str, model_name: str):
+        """
+        创建 LLM 实例
+
+        Args:
+            provider: 模型提供商 (openai/anthropic)
+            model_name: 模型名称
+
+        Returns:
+            LLM 实例
+        """
+        if provider.lower() == "openai":
+            return OpenAILLM(model_name)
+        elif provider.lower() == "anthropic":
+            return AnthropicLLM(model_name)
+        else:
+            # 默认使用 OpenAI
+            return OpenAILLM(model_name)