docs(readme): add HOL registry banner (#95)

* docs(readme): add HOL registry banner

Signed-off-by: Michael Kantor <6068672+kantorcodes@users.noreply.github.com>

* docs(readme): set banner dimensions

Signed-off-by: Michael Kantor <6068672+kantorcodes@users.noreply.github.com>

---------

Signed-off-by: Michael Kantor <6068672+kantorcodes@users.noreply.github.com>

Author: kantorcodes

README.md

@@ -9,7 +9,13 @@
 <p align="center">A curated list of awesome OpenAI Codex plugins, skills, and resources.</p>
 
 <p align="center">
-  <a href="https://github.com/hashgraph-online/awesome-codex-plugins/pulls"><img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg" alt="PRs Welcome"></a>
+  <a href="https://hol.org/registry/plugins">
+    <img src="assets/awesome-codex-plugins-hol.png" alt="Awesome Codex Plugins by HOL" width="960" height="540">
+  </a>
+</p>
+
+<p align="center">
+  <a href="http://makeapullrequest.com"><img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg" alt="PRs Welcome"></a>
   <a href="https://opensource.org/licenses/Apache-2.0"><img src="https://img.shields.io/badge/License-Apache_2.0-blue.svg" alt="License"></a>
   <a href="https://hol.org/registry/plugins"><img src="https://img.shields.io/badge/Browse-Registry-green" alt="Browse Registry"></a>
 </p>