Add XML README with TOC and NLASP placeholder

Co-authored-by: clauspruefer <17313789+clauspruefer@users.noreply.github.com>

Author: Copilot

specs/xml/NLASP-XML-SPECS.md

@@ -0,0 +1,7 @@
+# 3. Next Level Application Session Protocol (NLASP)
+
+## 3.1. Overview
+
+This specification is currently under development.
+
+Please refer to the [development status page](https://www.der-it-pruefer.de/network/Exemplary-HTTP-Processing-Protocol-Design) for the latest updates.

specs/xml/README.md

@@ -0,0 +1,13 @@
+# 1. XML Service Metadata Specifications
+
+This directory contains XML service metadata specifications for the Next Level Application Protocol (NLAP) sub-protocols.
+
+## 1.1. Table of Contents
+
+1. [Next Level Application Metadata Protocol (NLAMP)](./NLAMP-XML-SPECS.md)
+2. [Next Level Application File Protocol (NLAFP)](./NLAFP-XML-SPECS.md)
+3. [Next Level Application Session Protocol (NLASP)](./NLASP-XML-SPECS.md)
+
+## 1.2. Development Status
+
+Ongoing RFP / RFC development status: [Exemplary HTTP Processing Protocol Design](https://www.der-it-pruefer.de/network/Exemplary-HTTP-Processing-Protocol-Design)