feat(battle-engine): close the AI-simulation subsystem (verbatim)

Copied the 89 uncopied AI*SimulationUtility/extension files defining the
AIVirtualCard/AIVirtualField extension methods; the compile loop then auto-closed
the revealed type deps (~3049 files total, drift-clean). 10.0k -> 62 errors.

SVSim.BattleEngine/Engine/Sqlite3Plugin/DatabaseCorruptionException.cs

@@ -0,0 +1,11 @@
+using System;
+
+namespace Sqlite3Plugin;
+
+public class DatabaseCorruptionException : Exception
+{
+	public DatabaseCorruptionException(int rc)
+		: base($"Database is corrupted: code {rc}")
+	{
+	}
+}