add library name guidance (#66)

Author: akaszynski

doc/source/library_description/library_names.rst

@@ -20,7 +20,34 @@ Using long Python library names provides two primary advantages:
 - `Namespace Packages`_ can be used to designate official 
   Ansys packages
 - Consistent branding and style can be applied to PyAnsys libraries
-  
+
+
+gRPC Interface Package
+----------------------
+Lower level gRPC interface packages like `ansys-api-mapdl`_ should always be
+named ``ansys-api-<product/service>`` or may contain an additional level with
+``ansys-api-<product/service>-<secondlevel>``.
+
+This is to standarize the API packages:
+
+.. code::
+
+   ─ansys
+   │   ├───api
+   │   │   ├───<product/service>
+   │   │   │   ├───VERSION
+   │   │   │   ├───v1
+   │   │   │   │   ├───sample.proto
+
+
+Where the package name within ``sample.proto`` would be:
+
+.. code::
+
+   package ansys.api.<product/service>.v1;
+
+
 .. _PyMAPDL: https://github.com/pyansys/pymapdl
 .. _PyAEDT: https://github.com/pyansys/PyAEDT
 .. _Namespace Packages: https://packaging.python.org/guides/packaging-namespace-packages/
+.. _ansys-api-mapdl: https://pypi.org/project/ansys-api-mapdl/