fix: exposing interpolator api in module import

Author: lachlangrose

LoopStructural/__init__.py

@@ -19,6 +19,8 @@
 ch.setLevel(logging.WARNING)
 loggers = {}
 from .modelling.core.geological_model import GeologicalModel
+from .interpolators._api import LoopInterpolator
+from .datatypes import BoundingBox
 from .utils import log_to_console, log_to_file, getLogger
 
 logger = getLogger(__name__)