add script to test the kickstart file(s)

test-kickstart-file.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+KICKSTART_FILE=Rocky-9-aarch64-minimal.ks
+VERSION=RHEL9
+
+if ! command -v ksvalidator > /dev/null; then
+    >&2 echo "$0: error: unable to find command 'ksvalidator'"
+    exit 1
+fi
+
+ksvalidator --followincludes --version "${VERSION}" "${KICKSTART_FILE}"