Added hook option for plugins to inject into the main layout before the router

Moonlight.Frontend/Configuration/LayoutMiddlewareOptions.cs

@@ -0,0 +1,26 @@
+using System.Diagnostics.CodeAnalysis;
+using Moonlight.Frontend.Interfaces;
+
+namespace Moonlight.Frontend.Configuration;
+
+public class LayoutMiddlewareOptions
+{
+    public IReadOnlyList<Type> Components => InnerComponents;
+    
+    private readonly List<Type> InnerComponents = new();
+
+    public void Add<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.All)] T>() where T : LayoutMiddlewareBase
+    {
+        InnerComponents.Add(typeof(T));
+    }
+    
+    public void Insert<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.All)] T>(int index) where T : LayoutMiddlewareBase
+    {
+        InnerComponents.Insert(index, typeof(T));
+    }
+
+    public void Remove<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.All)] T>() where T : LayoutMiddlewareBase
+    {
+        InnerComponents.Remove(typeof(T));
+    }
+}