fix many implicit ifcopenshell.guid imports

a bit related to 10d30b0de

src/ifcpatch/ifcpatch/recipes/ConvertNestToAggregate.py

@@ -17,6 +17,7 @@
 # along with IfcPatch.  If not, see <http://www.gnu.org/licenses/>.
 
 import ifcopenshell
+import ifcopenshell.guid
 
 
 class Patcher:

src/ifcpatch/ifcpatch/recipes/ExtractElements.py

@@ -18,6 +18,7 @@
 
 import ifcopenshell
 import ifcopenshell.api
+import ifcopenshell.guid
 import ifcopenshell.util.selector
 from typing import Union
 from logging import Logger

src/ifcpatch/ifcpatch/recipes/RegenerateGlobalIds.py

@@ -17,6 +17,7 @@
 # along with IfcPatch.  If not, see <http://www.gnu.org/licenses/>.
 
 import ifcopenshell
+import ifcopenshell.guid
 from logging import Logger