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

Moonlight.Frontend/UI/Shared/LayoutMiddleware.razor

@@ -0,0 +1,34 @@
+@using Microsoft.Extensions.Options
+@using Moonlight.Frontend.Configuration
+@using Moonlight.Frontend.Interfaces
+
+@inject IOptions<LayoutMiddlewareOptions> Options
+
+@Chain
+
+@code
+{
+    [Parameter] public RenderFragment ChildContent { get; set; }
+    
+    private RenderFragment Chain;
+
+    protected override void OnInitialized()
+    {
+        Chain = ChildContent;
+
+        foreach (var component in Options.Value.Components)
+        {
+            // Capture current values
+            var currentChain = Chain;
+            var currentComponent = component;
+            
+            Chain = builder =>
+            {
+                builder.OpenComponent(0, currentComponent);
+                builder.SetKey(component);
+                builder.AddComponentParameter(1, nameof(LayoutMiddlewareBase.ChildContent), currentChain);
+                builder.CloseComponent();
+            };
+        }
+    }
+}