docs: add horizontal rule to README for improved section separation

TMHSDigital · TMHSDigital · commit 2619f16d58af · 2026-06-13T13:14:02.000-04:00
diff --git a/README.md b/README.md
@@ -1,5 +1,7 @@
 <h1 align="center">Blender Developer Tools</h1>
 
+---
+
 <p align="center">
   <strong>Skills, rules, snippets, and a starter template for Blender Python development</strong>
 </p>
