Add hex doc provider config and improve module documentation

Author: benoitc

rebar.config

@@ -28,6 +28,8 @@
 
 {project_plugins, [rebar3_ex_doc]}.
 
+{hex, [{doc, ex_doc}]}.
+
 {ex_doc, [
     {source_url, <<"https://github.com/benoitc/erlang-python">>},
     {main, <<"readme">>},

src/erlang_python_app.erl

@@ -12,6 +12,8 @@
 %% See the License for the specific language governing permissions and
 %% limitations under the License.
 
+%%% @doc Application callback module for erlang_python.
+%%% @private
 -module(erlang_python_app).
 -behaviour(application).
 

src/erlang_python_sup.erl

@@ -12,6 +12,16 @@
 %% See the License for the specific language governing permissions and
 %% limitations under the License.
 
+%%% @doc Top-level supervisor for erlang_python.
+%%%
+%%% Manages the worker pools for Python execution:
+%%% <ul>
+%%%   <li>py_callback - Callback registry for Python to Erlang calls</li>
+%%%   <li>py_pool - Main worker pool for synchronous Python calls</li>
+%%%   <li>py_async_pool - Worker pool for asyncio coroutines</li>
+%%%   <li>py_subinterp_pool - Worker pool for sub-interpreter parallelism</li>
+%%% </ul>
+%%% @private
 -module(erlang_python_sup).
 -behaviour(supervisor).