feat(node): package Ubuntu desktop setup and trusted access

apps/node-agent/packaging/preinst

@@ -0,0 +1,9 @@
+#!/bin/sh
+set -eu
+if [ "$1" = install ] || [ "$1" = upgrade ]; then
+  . /etc/os-release
+  if [ "${ID:-}" != ubuntu ] || [ "${VERSION_ID:-}" != 24.04 ]; then
+    echo "Mission Core Node: this package requires Ubuntu 24.04 LTS Desktop amd64." >&2
+    exit 1
+  fi
+fi