Made sidebar item collection extendable via interface. Refactored settings to system

Moonlight.Frontend/Models/SidebarItem.cs

@@ -0,0 +1,17 @@
+using System.Diagnostics.CodeAnalysis;
+
+namespace Moonlight.Frontend.Models;
+
+public record SidebarItem
+{
+    public string Name { get; init; }
+    public string Path { get; init; }
+    public bool IsExactPath { get; init; }
+    public string? Group { get; init; }
+    public int Order { get; init; }
+
+    // Used to prevent the IL-Trimming from removing this type as its dynamically assigned a type and we
+    // need it to work properly
+    [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.All)]
+    public Type IconType { get; init; }
+}