[Sofa.Core] Add an attribute 'link' to Binding_BaseData.

So we can write:
object.position.link instead of object.position.getLinkPath()

Which will make the syntax a bit more compact.

Signed-off-by: Damien Marchal <damien.marchal@univ-lille1.fr>

Author: damienmarchal

bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_BaseData.cpp

@@ -137,6 +137,9 @@ py::object __getattr__(py::object self, const std::string& s)
     if(s == "value")
         return PythonFactory::valueToPython_ro(py::cast<BaseData*>(self));
 
+    if(s == "link")
+        return py::cast((py::cast<BaseData*>(self))->getLinkPath());
+
     /// BaseData does not support dynamic attributes, if you think this is an important feature
     /// please request for its integration.
     throw py::attribute_error("There is no attribute '"+s+"'");