doc: improve intro

README.md

@@ -2,6 +2,8 @@
 
 I’m coming across having to write the same shell script bits occasionally, and I got tired of jumping backwards through my projects to find the latest version, so here is a repository.
 
+This is a *slowly* growing collection of hopefully useful and reusable shell functions and patterns.
+
 Copyright (c) 2022 Jan Lehnardt <jan@apache.org>, MIT licensed
 
 ## Goals