Nullable fixes, use Texture2d resource for rendering directly.

DaggerFramework/Source/Resources/Font.cs

@@ -5,7 +5,7 @@ public class Font : Resource
     /// <summary>
     /// Internal handle for the font. If it got successfully loaded into the GPU, the value will be other than -1.
     /// </summary>
-    internal int FontHandle { get; set; } = -1;
+    internal int Handle { get; set; } = -1;
     public int Size { get; set; } = 16;
     public Font(string path, byte[] buffer) : base(path, buffer)
     {