feat: wire game window, render loop, and fly-camera input

Program.cs

@@ -1,11 +1,16 @@
-using OpenTK;
+using OpenTK.Mathematics;
+using OpenTK.Windowing.Common;
+using OpenTK.Windowing.Desktop;
+using VoxelEngine.Core;
 
-namespace VoxelEngine;
-
-class Program
+var nativeSettings = new NativeWindowSettings
 {
-    static void Main(string[] args)
-    {
-        Console.WriteLine("Hello, World!");
-    }
-}
+    ClientSize = new Vector2i(1280, 720),
+    Title = "VoxelEngine",
+    APIVersion = new Version(3, 3),
+    Profile = ContextProfile.Core,
+    Flags = ContextFlags.ForwardCompatible
+};
+
+using var game = new Game(GameWindowSettings.Default, nativeSettings);
+game.Run();