Replace selectable name sets with a country that owns names and climate presets.

Create picks a country; climate is rolled from the school seed and stored. Old Slavic saves lift as Russia.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/HSchool.Server/mods/core/localizations/en.jsonc

@@ -104,7 +104,9 @@
   "Hunger": "Hunger",
   "Toilet": "Toilet",
   "Social": "Social",
-  "Slavic": "Slavic",
+  "Russia": "Russia",
+  "TemperateContinental": "Temperate continental",
+  "ContinentalCold": "Cold continental",
   "Build": "Build",
   "Skinny": "Skinny",
   "Average": "Average",

src/HSchool.Server/mods/core/localizations/ru.jsonc

@@ -104,7 +104,9 @@
   "Hunger": "Голод",
   "Toilet": "Туалет",
   "Social": "Общение",
-  "Slavic": "Славянский",
+  "Russia": "Россия",
+  "TemperateContinental": "Умеренно-континентальный",
+  "ContinentalCold": "Континентальный холодный",
   "Build": "Телосложение",
   "Skinny": "Худощавое",
   "Average": "Обычное",