Switched to SimplePlugin plugin loader

Hosts/Moonlight.Api.Host/Program.cs

@@ -1,17 +1,22 @@
-using Moonlight.Api.Host;
+using Moonlight.Api.Startup;
+using SimplePlugin.Generated;
 
-var appLoader = new AppStartupLoader();
-appLoader.Initialize();
+var modules = PluginRegistry.Modules
+    .OfType<IAppStartup>()
+    .ToArray();
 
 var builder = WebApplication.CreateBuilder(args);
 
-appLoader.PreBuild(builder);
+foreach (var startup in modules)
+    startup.PreBuild(builder);
 
 var app = builder.Build();
 
-appLoader.PostBuild(app);
+foreach (var startup in modules)
+    startup.PostBuild(app);
 
-appLoader.PostMiddleware(app);
+foreach (var startup in modules)
+    startup.PostMiddleware(app);
 
 if (app.Environment.IsDevelopment())
     app.UseWebAssemblyDebugging();