Enhance school simulation management by introducing a new SchoolWeekDays option, allowing configuration of the number of working days in a week. Update the API to include school week days in responses and enhance documentation to reflect these changes. Revise UI components to support the new management features, ensuring a seamless user experience when hiring and assigning staff. Update localization strings for improved clarity and consistency across the application.

src/HSchool.Content/Defs.cs

@@ -17,6 +17,8 @@ public enum DefKind
     NameSet,
     Subject,
     Staffing,
+    DayFrame,
+    Holiday,
 }
 
 /// <summary>Shared JSONC fields. Kind comes from the folder under <c>defs/</c>, not from the file.</summary>