Add AirflowConfig class for centralized configuration management

src/airflow_mcp_server/config.py

@@ -0,0 +1,25 @@
+class AirflowConfig:
+    """Centralized configuration for Airflow MCP server."""
+
+    def __init__(self, base_url: str | None = None, spec_path: str | None = None, auth_token: str | None = None, cookie: str | None = None) -> None:
+        """Initialize configuration with provided values.
+
+        Args:
+            base_url: Airflow API base URL
+            spec_path: Path to OpenAPI spec file
+            auth_token: Authentication token
+            cookie: Session cookie
+
+        Raises:
+            ValueError: If required configuration is missing
+        """
+        self.base_url = base_url
+        if not self.base_url:
+            raise ValueError("Missing required configuration: base_url")
+
+        self.spec_path = spec_path
+        self.auth_token = auth_token
+        self.cookie = cookie
+
+        if not self.auth_token and not self.cookie:
+            raise ValueError("Either auth_token or cookie must be provided")