Added page hooks for main layout

Moonlight.Frontend/Configuration/LayoutPageOptions.cs

@@ -0,0 +1,33 @@
+using System.Diagnostics.CodeAnalysis;
+using Microsoft.AspNetCore.Components;
+
+namespace Moonlight.Frontend.Configuration;
+
+public class LayoutPageOptions
+{
+    public IReadOnlyList<LayoutPageComponent> Components => InnerComponents;
+    
+    private readonly List<LayoutPageComponent> InnerComponents = new();
+
+    public void Add<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.All)] T>(LayoutPageSlot slot, int order)
+        where T : ComponentBase
+        => Add(typeof(T), slot, order);
+    
+    public void Add(Type componentType, LayoutPageSlot slot, int order)
+        => InnerComponents.Add(new LayoutPageComponent(componentType, order, slot));
+
+    public void Remove<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.All)] T>()
+        where T : ComponentBase
+        => Remove(typeof(T));
+
+    public void Remove(Type componentType)
+        => InnerComponents.RemoveAll(x => x.ComponentType == componentType);
+}
+
+public record LayoutPageComponent(Type ComponentType, int Order, LayoutPageSlot Slot);
+
+public enum LayoutPageSlot
+{
+    Header = 0,
+    Footer = 1
+}