Gui: Convert XML bindings to Python API bindings model.

This converts the existing XML binding files to the new Python bindings
generator model.

src/Gui/ViewProviderDocumentObject.pyi

@@ -0,0 +1,26 @@
+from ViewProvider import ViewProvider
+from typing import Any, Final
+
+
+class ViewProviderDocumentObject(ViewProvider):
+    """
+    This is the ViewProvider base class
+
+    Author: Werner Mayer (wmayer@users.sourceforge.net)
+    Licence: LGPL
+    """
+
+    def update(self) -> None:
+        """
+        Update the view representation of the object
+        """
+        ...
+
+    Object: Any = ...
+    """Set/Get the associated data object"""
+
+    ForceUpdate: bool = False
+    """Reference count to force update visual"""
+
+    Document: Final[Any] = ...
+    """Return the document the view provider is part of"""