Implement Apex Agent MVP scaffold

tools/_device.py

@@ -0,0 +1,13 @@
+from __future__ import annotations
+
+from core.device_manager import DEFAULT_MANAGER, DeviceManager
+from core.driver import Driver
+
+
+def get_driver(
+    device_id: str | None = None,
+    *,
+    manager: DeviceManager | None = None,
+) -> Driver:
+    return (manager or DEFAULT_MANAGER).active_driver(device_id)
+