Add Debian 13 packaging for g15stats

debian/tests/control

@@ -0,0 +1,3 @@
+Tests: help
+Depends: @
+Restrictions: superficial

debian/tests/help

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+#!/bin/sh
+set -eu
+# Help returns before daemon connection, sensor polling or keyboard threads.
+# Run only in an isolated testbed without USB device passthrough.
+work=$(mktemp -d)
+trap 'rm -rf "$work"' EXIT HUP INT TERM
+timeout 5 g15stats --help > "$work/long"
+timeout 5 g15stats -h > "$work/short"
+cmp "$work/long" "$work/short"
+grep -F 'g15stats 3.0.3+git20240609.95de11a' "$work/long"
+grep -F -- '--interface' "$work/long"
+grep -F -- '--refresh' "$work/long"