Cut the comments from the refactored code

Three survive: why AppServices is hand-wired, the cp1250 registration trap, and
the IsDieselEngine note carried over from Physics.cs.

StarterNG/Application/Abstractions/IPhysicsRepository.cs

@@ -2,20 +2,11 @@ using StarterNG.Domain.Vehicles;
 
 namespace StarterNG.Application.Abstractions;
 
-/// <summary>
-/// Looks up the .fiz physics of a vehicle type by model name.
-/// </summary>
 public interface IPhysicsRepository
 {
-    /// <summary>Indexes the installation's .fiz files up front, off the UI thread.</summary>
     void Preload();
 
-    /// <summary>How many vehicle types were indexed; zero means a broken installation.</summary>
     int IndexedCount { get; }
 
-    /// <summary>
-    /// Physics for a model name (with or without extension), or null when the
-    /// installation has no .fiz for it.
-    /// </summary>
     VehiclePhysics? For(string? dataFolder, string? model);
 }