Add uberspace crontab handling

bundles/uberspace-crontab-dir/files/crontab-dir-generate-crontab.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+echo "# Generated from ~/.config/cron.d"
+echo "# Use crontab-dir-update to regenerate"
+echo
+echo "PATH=$HOME/.local/bin:$HOME/bin:\$PATH"
+echo
+
+find $HOME/.config/cron.d -mindepth 1 -maxdepth 1 -type f | sort | xargs cat