All: Add docs job to publish to googleapis.dev. (#8464)


diff --git a/docs/retry.rst b/docs/retry.rst
new file mode 100644
index 0000000..23a7d70
--- /dev/null
+++ b/docs/retry.rst
@@ -0,0 +1,6 @@
+Retry
+=====
+
+.. automodule:: google.api_core.retry
+  :members:
+  :show-inheritance: