entity_instance: switch to use of declaration as a property

Fixes most of the bonsai tests.

src/bonsai/bonsai/bim/helper.py

@@ -187,7 +187,7 @@ def import_attributes(
         info = {a.name(): None for a in attributes}
         info["type"] = element
     else:
-        assert (entity := element.declaration().as_entity())
+        assert (entity := element.declaration.as_entity())
         attributes = entity.all_attributes()
         info = element.get_info()
     for attribute in attributes:

src/bonsai/bonsai/bim/module/cost/data.py

@@ -206,7 +206,7 @@ class CostSchedulesData:
                 data["UnitSymbol"] = ifcopenshell.util.unit.get_unit_symbol(unit)
             if quantity.is_a("IfcPhysicalSimpleQuantity"):
                 measure_class = (
-                    quantity.declaration()
+                    quantity.declaration
                     .as_entity()
                     .attribute_by_index(3)
                     .type_of_attribute()

src/bonsai/bonsai/bim/module/search/data.py

@@ -95,7 +95,7 @@ class ColourByPropertyData:
         element = tool.Ifc.get_entity(obj)
         if not element:
             return default
-        keys = [a.name() for a in element.declaration().as_entity().all_attributes()]
+        keys = [a.name() for a in element.declaration.as_entity().all_attributes()]
         psets = ifcopenshell.util.element.get_psets(element)
         for pset, properties in psets.items():
             if pset.endswith("Common"):
@@ -126,7 +126,7 @@ class SelectSimilarData:
         element = tool.Ifc.get_entity(obj)
         if not element:
             return []
-        keys = [a.name() for a in element.declaration().as_entity().all_attributes()]
+        keys = [a.name() for a in element.declaration.as_entity().all_attributes()]
         psets = ifcopenshell.util.element.get_psets(element, psets_only=True)
         for pset, properties in psets.items():
             if pset.endswith("Common"):

src/bonsai/bonsai/tool/geometry.py

@@ -2166,7 +2166,7 @@ class Geometry(bonsai.core.tool.Geometry):
         item = tool.Ifc.get().by_id(props.ifc_definition_id)
         allowed_attributes = [
             a.name()
-            for a in item.declaration().as_entity().all_attributes()
+            for a in item.declaration().as_entity.all_attributes()
             if a.type_of_attribute()._is("IfcLengthMeasure")
         ]