Update and rename README.md to README.adoc

Author: hyperpolymath

README.md README.adocREADME.md renamed to README.adoc

@@ -1,6 +1,6 @@
 = Valence Shell (vsh)
 
-image:https://img.shields.io/badge/License-PMPL--1.0-blue.svg[License: PMPL-1.0,link="https://github.com/hyperpolymath/palimpsest-license"]
+image:https://[License: PMPL-1.0,link="https://github.com/hyperpolymath/palimpsest-license"]
 // SPDX-License-Identifier: PMPL-1.0-or-later
 // SPDX-FileCopyrightText: 2025 Jonathan D.A. Jewell