Add select method to Mapdl

[germa89]

It will be nice to have something like:

mapdl.select("KP", [1,2,3])
mapdl.select("NODE", [2, 5, 10])
mapdl.select("COMP", ["component1", "component2"])

I think it will simplify plenty of inner workings and could help developers to speed up their work.

[germa89]

It will be amazing if this can be done in only one gRPC call ... and not issue a single call for each element.
That will require to have access/implement MAPDL functions, probably on ansGRPC.

We could speed up the function by using non-interactive.