update docstrings to RST for Sphinx

docs/index.md

@@ -3,19 +3,23 @@
 {ref}`modindex`
 {ref}`search`
 
+## Top-level module overview
+
 ```{eval-rst}
 .. autosummary::
    :nosignatures:
+   :recursive:
 
     execlog.Handler
     execlog.Listener
     execlog.Router
     execlog.Server
+    execlog.listeners
 ```
 
+## Auto-reference contents
 ```{toctree}
 :maxdepth: 3
-:caption: Autoref
 
 _autoref/execlog.rst
 ```