fix : pkg paths

aidge_core/__init__.py

@@ -7,5 +7,5 @@ http://www.eclipse.org/legal/epl-2.0.
 
 SPDX-License-Identifier: EPL-2.0
 """
-from aidge_core.aidge_core import * # import so generated by PyBind
-from aidge_core.export import ExportNode
+from . import * # import so generated by PyBind
+from .export import ExportNode