feat: 新增 core/agents 模块和 nanobot

- 新增 agents 模块，包含 agent、api、skills 等子模块
- 新增 nanobot 项目，支持多渠道集成
- 添加启动脚本 start-all.bat 和 start-all.sh

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

core/agents/config.py

@@ -0,0 +1,56 @@
+"""Configuration for X-Agents."""
+
+import os
+from pathlib import Path
+from typing import Any
+
+# 尝试加载 .env 文件
+try:
+    from dotenv import load_dotenv
+    # 查找 .env 文件：从当前目录向上查找
+    env_paths = [
+        Path(__file__).parent.parent.parent / ".env",  # X-Agents/.env
+        Path(__file__).parent.parent / ".env",          # core/.env
+        Path(__file__).parent / ".env",                 # agents/.env
+    ]
+    for env_path in env_paths:
+        if env_path.exists():
+            load_dotenv(env_path)
+            break
+except ImportError:
+    pass  # python-dotenv 未安装时跳过
+
+
+class Config:
+    """X-Agents configuration."""
+
+    # API settings
+    API_HOST: str = os.getenv("PYTHON_HOST", os.getenv("API_HOST", "0.0.0.0"))
+    API_PORT: int = int(os.getenv("PYTHON_PORT", os.getenv("API_PORT", "8001")))
+
+    # LLM settings
+    LLM_PROVIDER: str = os.getenv("PYTHON_LLM_PROVIDER", os.getenv("LLM_PROVIDER", "openai"))
+    LLM_MODEL: str = os.getenv("PYTHON_LLM_MODEL", os.getenv("LLM_MODEL", "gpt-4o"))
+    LLM_API_KEY: str = os.getenv("PYTHON_LLM_API_KEY", os.getenv("LLM_API_KEY", ""))
+    LLM_BASE_URL: str | None = os.getenv("PYTHON_LLM_BASE_URL", os.getenv("LLM_BASE_URL", None))
+
+    # Workspace
+    WORKSPACE: Path = Path(os.getenv("PYTHON_WORKSPACE", os.getenv("WORKSPACE", "./workspace")))
+
+    # Agent settings
+    MAX_ITERATIONS: int = int(os.getenv("PYTHON_MAX_ITERATIONS", os.getenv("MAX_ITERATIONS", "10")))
+    TEMPERATURE: float = float(os.getenv("PYTHON_TEMPERATURE", os.getenv("TEMPERATURE", "0.7")))
+
+    def __init__(self, **kwargs: Any):
+        """Initialize config with overrides.
+
+        Args:
+            **kwargs: Configuration overrides
+        """
+        for key, value in kwargs.items():
+            if hasattr(self, key):
+                setattr(self, key, value)
+
+
+# Default config instance
+config = Config()