Fetch a curated dividend list by `slug`. Slugs: dividend-aristocrats,
dividend-kings, monthly-dividend-stocks, highest-yield-dividend-stocks,
safest-reits, dividend-growth-stocks, low-debt-dividend-stocks,
large-cap-safe-dividend-stocks, utility-dividend-stocks,
healthcare-dividend-stocks, consumer-staples-dividend-stocks,
energy-dividend-stocks, european-dividend-stocks, best-dividend-etfs,
monthly-dividend-etfs, best-momentum-dividend-stocks,
undervalued-dividend-stocks. Returns the list's title, intro and ranked
stocks (compact rows — call get_stock for a full read).
Set `eu_only` to keep only holdings listed on a European exchange. This
matters most on the two fund lists: a US-listed ETF has no key information
document under European rules, so a European broker refuses the order — most
of the funds in `best-dividend-etfs` are US-listed and unbuyable from Europe.
Use it whenever the person asking is investing from Europe.