Broken Stripe fixtures script removed
The template no longer includes a stripe:fixtures script that pointed at a missing file.
bun run stripe:fixtures failed because it pointed at a file path that does
not exist. The script and the older Starter, Pro and Enterprise catalog it was
meant to load are removed; nothing else used them. The TanStack Start
template gets the same change.
The lifetime and subscription fixtures the billing guides use are unchanged,
as are their stripe:fixtures:lifetime and stripe:fixtures:subscription
scripts.
Upgrade: apply the template update. No other action is needed.