Add the ticket page data model and its ticket-page CLI

user/agents/skills/ticket/scripts/ticket-page

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+# Runs the ticket page CLI under bun. See ../SITE.md, or: ticket-page help
+set -euo pipefail
+here="$(dirname "$(readlink -f "$0")")"
+command -v bun >/dev/null 2>&1 || { echo "ticket-page: bun is not on PATH" >&2; exit 127; }
+exec bun "$here/ticket-page.ts" "$@"