Add EventDef notices, morning and lesson bells, and info toasts.

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

src/HSchool.Server/mods/core/defs/events/notices.jsonc

@@ -0,0 +1,26 @@
+[
+  {
+    "defName": "DayStarted",
+    "severity": "info",
+    "pause": false,
+    "ttlMs": 8000,
+    "trigger": "dayStart",
+    "action": "none",
+  },
+  {
+    "defName": "LessonStarted",
+    "severity": "info",
+    "pause": false,
+    "ttlMs": 8000,
+    "trigger": "lessonStart",
+    "action": "none",
+  },
+  {
+    "defName": "GenerationFailed",
+    "severity": "error",
+    "pause": true,
+    "ttlMs": 0,
+    "trigger": "generationFailed",
+    "action": "none",
+  },
+]

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

@@ -224,5 +224,8 @@
   "LessonNoTeacher": "lesson without a teacher: {0}",
   "LessonCold": "too cold in class: {0}",
   "LessonNoTextbook": "no textbook: {0}",
+  "DayStarted": "The day has started",
+  "LessonStarted": "A lesson has started",
+  "GenerationFailed": "Portrait generation failed",
   "core": "Core",
 }

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

@@ -224,5 +224,8 @@
   "LessonNoTeacher": "урок без учителя: {0}",
   "LessonCold": "замёрз на уроке: {0}",
   "LessonNoTextbook": "нет учебника: {0}",
+  "DayStarted": "Начало дня",
+  "LessonStarted": "Начало урока",
+  "GenerationFailed": "Не удалось нарисовать портрет",
   "core": "Базовая игра",
 }