Official formats now explain themselves

Standard, Pioneer, Modern, Legacy, Pauper, and Commander pages now show a short identity summary: what actually defines the legal card pool (sets, or for Pauper, rarity), a power-level label with a one-line note, a short metagame summary, and a live card-pool count with a link straight to the matching Scryfall search. No more guessing what "Modern" means on this site versus in general — it's spelled out right on the format page.