Add cicd-squabbler banner image to README

- Add cicd-squabbler.png banner image
- Insert banner at top of README.adoc with 100% width

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

Author: hyperpolymath

README.adoc

@@ -4,6 +4,8 @@
 :toc: preamble
 :icons: font
 
+image::cicd-squabbler.png[CICD Squabbler Banner,width="100%",link=""]
+
 image:https://img.shields.io/badge/License-MPL_2.0-blue.svg[code: MPL-2.0]
 image:https://img.shields.io/badge/docs-CC--BY--SA--4.0-green.svg[docs: CC-BY-SA-4.0]
 image:https://img.shields.io/badge/invariant-SPARK--proved-success.svg[squabble≠bypass: proved]