chore: add contrib banner

pi0 · web-flow · commit c37129e815fd · 2025-07-01T16:42:56.000+02:00
diff --git a/README.md b/README.md
@@ -9,6 +9,9 @@
 
 Simple [OpenAPI](https://www.openapis.org/) spec to HTML renderer.
 
+> [!NOTE]
+>  This is a new project, so feel free to share your ideas and contribute. **Contributions are more than welcome!**
+
 ## Supported Renderers
 
 <div align="center">
