Save all properties from Preferences UI as actual preferences

Previously some of them were saved only for current .blend file, moving them to preferences will make it more consistent with usual Blender UX. If needed we'll be able to add some way to fine-grain them later.

There's also a temporary patch that's going to migrate old .blend-props to new preferences-props to make process less disruptive.

src/bonsai/bonsai/bim/ifc.py

@@ -126,11 +126,11 @@ class IfcStore:
     @staticmethod
     def get_cache() -> ifcopenshell.geom.serializers.hdf5 | None:
         if IfcStore.cache is None and IfcStore.path:
-            props = tool.Blender.get_bim_props()
+            prefs = tool.Blender.get_addon_preferences()
             ifc_key = IfcStore.path + IfcStore.file.wrapped_data.header.file_name.time_stamp
             ifc_hash = hashlib.md5(ifc_key.encode("utf-8")).hexdigest()
-            os.makedirs(props.cache_dir, exist_ok=True)
-            IfcStore.cache_path = os.path.join(props.cache_dir, f"{ifc_hash}.h5")
+            os.makedirs(prefs.cache_dir, exist_ok=True)
+            IfcStore.cache_path = os.path.join(prefs.cache_dir, f"{ifc_hash}.h5")
             cache_path = Path(IfcStore.cache_path)
             cache_settings = ifcopenshell.geom.settings()
             serializer_settings = ifcopenshell.geom.serializer_settings()
@@ -170,8 +170,8 @@ class IfcStore:
         assert IfcStore.file
         ifc_key = IfcStore.path + IfcStore.file.wrapped_data.header.file_name.time_stamp
         ifc_hash = hashlib.md5(ifc_key.encode("utf-8")).hexdigest()
-        props = tool.Blender.get_bim_props()
-        new_cache_path = os.path.join(props.cache_dir, f"{ifc_hash}.h5")
+        prefs = tool.Blender.get_addon_preferences()
+        new_cache_path = os.path.join(prefs.cache_dir, f"{ifc_hash}.h5")
         IfcStore.cache = None
         try:
             shutil.move(IfcStore.cache_path, new_cache_path)