adding ai_economist for modding

ai_economist/foundation/components/__init__.py

@@ -0,0 +1,19 @@
+# Copyright (c) 2020, salesforce.com, inc.
+# All rights reserved.
+# SPDX-License-Identifier: BSD-3-Clause
+# For full license text, see the LICENSE file in the repo root
+# or https://opensource.org/licenses/BSD-3-Clause
+
+from ai_economist.foundation.base.base_component import component_registry
+
+from . import (
+    build,
+    continuous_double_auction,
+    covid19_components,
+    move,
+    redistribution,
+    simple_labor,
+)
+
+# Import files that add Component class(es) to component_registry
+# ---------------------------------------------------------------