Implement support for adding BCF document references

src/ifcblenderexport/blenderbim/bim/__init__.py

@@ -39,6 +39,7 @@ if bpy is not None:
         operator.AddBcfHeaderFile,
         operator.AddBcfBimSnippet,
         operator.AddBcfReferenceLink,
+        operator.AddBcfDocumentReference,
         operator.AddBcfLabel,
         operator.ViewBcfTopic,
         operator.RemoveBcfComment,
@@ -58,6 +59,7 @@ if bpy is not None:
         operator.OpenBcfReferenceLink,
         operator.SelectBcfHeaderFile,
         operator.SelectBcfBimSnippetReference,
+        operator.SelectBcfDocumentReference,
         operator.SelectFeaturesDir,
         operator.SelectDiffJsonFile,
         operator.SelectDiffNewFile,