Enhance school day structure and decision-making for lunch breaks

- Updated `ai.md` to clarify the mechanics of hunger restoration and the importance of lunch breaks in the school schedule.
- Revised `schedule.md` to detail the new lunch break structure, allowing for separate sittings for different grade levels.
- Enhanced `Decision.cs` and `DecisionPlanner.cs` to incorporate logic for lunch breaks, ensuring that students only leave lessons during their designated lunch windows.
- Updated `DayFrameDef` and related classes to support multiple lunch breaks and validate their configurations.
- Adjusted tests to validate the new decision-making logic regarding lunch breaks and hunger management, ensuring robust functionality.
- Improved localization strings to reflect changes in the school day structure and lunch functionalities.

tests/HSchool.Content.Tests/PeopleDefTests.cs

@@ -18,7 +18,7 @@ public class PeopleDefTests
         Assert.Equal(BodyAttributeKind.Choice, catalog.BodyAttributes["HairColor"].Kind);
         Assert.All(catalog.Needs.Values, need => Assert.True(need.DecayPerHour > 0));
         Assert.True(catalog.Needs["Sleep"].RestoredOffCampus);
-        Assert.Equal(0.1f, catalog.Needs["Hunger"].DecayPerHour);
+        Assert.Equal(0.2f, catalog.Needs["Hunger"].DecayPerHour);
         Assert.True(catalog.Skills["Communication"].Always);
         Assert.True(catalog.Skills["Agility"].Always);
         Assert.True(catalog.Skills["Pedagogy"].Work);