Added DeepWiki to README (#424)

Author: Nusnus

README.rst

@@ -1,10 +1,15 @@
 ========
 billiard
 ========
-:version: 4.2.1
 
 |build-status-lin| |build-status-win| |license| |wheel| |pyversion| |pyimp|
 
+:Version: 4.2.1
+:Web: https://billiard.readthedocs.io
+:Download: https://pypi.org/project/billiard/
+:Source: https://github.com/celery/billiard/
+:DeepWiki: |deepwiki|
+
 .. |build-status-lin| image:: https://github.com/celery/billiard/actions/workflows/ci.yaml/badge.svg
     :alt: Build status on Linux
     :target: https://github.com/celery/billiard/actions/workflows/ci.yaml
@@ -29,6 +34,11 @@ billiard
     :alt: Support Python implementations.
     :target: https://pypi.org/project/billiard/
 
+.. |deepwiki| image:: https://devin.ai/assets/deepwiki-badge.png
+    :alt: Ask http://DeepWiki.com
+    :target: https://deepwiki.com/celery/billiard
+    :width: 125px
+
 About
 -----