Enhance AI and simulation components with presence management and routing capabilities

- Introduced the `HSchool.Ai` project, responsible for routing, day plans, and presence management.
- Updated the `HSchool.Simulation` project to integrate with the new AI functionalities, improving decision-making and presence tracking.
- Added `travelMinutes` to room and territory definitions, ensuring accurate movement calculations within the simulation.
- Enhanced the `School` class to manage presence and implement empty-time skipping functionality.
- Updated documentation to reflect the new AI features and their impact on school simulation.
- Added tests for presence management and routing to ensure robust functionality and reliability.

src/HSchool.Server/Game/SchoolStore.cs

@@ -27,6 +27,8 @@ internal sealed class SchoolSave
     public MapLayout? Map { get; init; }
 
     public string? NameSetId { get; init; }
+
+    public IReadOnlyList<PresenceSnapshot>? Presence { get; init; }
 }
 
 /// <summary>Allocates school ids that survive a process restart.</summary>
@@ -160,6 +162,7 @@ internal sealed class SchoolStore
                     ModIds = save.ModIds,
                     Map = save.Map,
                     NameSetId = save.NameSetId,
+                    Presence = save.Presence,
                 });
             }
             catch (Exception ex)