Global food-culture & ingredient spotlights

New: Caribbean food culture deep dive (Indian Arrival Day context), Shawarma origins (food-culture, no recipe), Regional Cuisine of Kyushu (tonkotsu ramen, basashi, kurobuta pork with historical context). Builds on Egyptian Dukkah (spice blend with cultural context) and Bhut Jolokia spice culture. Today added: Why Red Chili Remains an Essential Ingredient (ingredient spotlight: history, capsaicin, Scoville, global varieties). No recipes but strong cultural depth for intermediate cooks seeking context.