Implement Apex Agent MVP scaffold

tests/test_smoke.py

@@ -0,0 +1,9 @@
+from __future__ import annotations
+
+import importlib
+
+
+def test_imports_new_packages() -> None:
+    for package in ("core", "tools", "vision", "runtime", "api", "storage"):
+        importlib.import_module(package)
+