stats: core-7 economy page with CPI index levels, rebase and categories

- /stats/economy defaults multi-country charts to CAN KOR CHN JPN USA NLD CUW,
  with add-a-country chips and an EU 27 comparison line
- CPI index levels rebased to a chosen base year, index/YoY toggle,
  categories (food, energy, housing, core) where the source has them
- new no-key collectors: oecd (CPI categories, 10y yields), statcan (CPI);
  bis WS_LONG_CPI, FRED US CPI categories, Eurostat prc_hicp_minr, WB FP.CPI.TOTL
- Canada added as a region; CBS Curacao fallbacks for growth/unemployment
- timers stats-oecd and stats-statcan

scripts/stats/worldbank.ts

@@ -27,6 +27,7 @@ export const WB_INDICATORS: { id: string; title: string; unit: string; theme: st
 	{ id: 'NY.GDP.MKTP.CD', title: 'GDP', unit: 'current USD', theme: 'countries' },
 	{ id: 'NY.GDP.MKTP.KD.ZG', title: 'GDP growth', unit: '%', theme: 'countries' },
 	{ id: 'FP.CPI.TOTL.ZG', title: 'Inflation, consumer prices', unit: '%', theme: 'countries' },
+	{ id: 'FP.CPI.TOTL', title: 'Consumer price index', unit: 'Index 2010=100', theme: 'economy' },
 	{ id: 'SP.POP.TOTL', title: 'Population', unit: 'people', theme: 'countries' },
 	{ id: 'SM.POP.NETM', title: 'Net migration', unit: 'people', theme: 'countries' },
 	{