Finalizing Python interface bindings for assembly

src/Mod/Assembly/App/BomObject.pyi

@@ -0,0 +1,12 @@
+from Base.Metadata import export
+from Spreadsheet.Sheet import Sheet
+
+@export(
+    Include="Mod/Assembly/App/BomObject.h",
+    FatherInclude="Mod/Spreadsheet/App/SheetPy.h",
+    Namespace="Assembly",
+)
+class BomObject(Sheet):
+    """
+    This class is the BOM object of assemblies, it derives from Spreadsheet::Sheet.
+    """