Include Silk.NET, begin GlRenderer.

Source/Rendering/GlRenderer.cs

@@ -0,0 +1,105 @@
+using System.Drawing;
+using System.Numerics;
+
+namespace DaggerFramework.Rendering
+{
+    public class GlRenderer : Renderer
+    {
+        public override Vector2 WindowSize => throw new NotImplementedException();
+
+        public override void BeginFrame()
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void ClearBackground(Color color)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void CreateWindow(string title, Vector2 size)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void CloseWindow()
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void DrawCircle(float radius, Color color)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void DrawDebugText(Vector2 position, string text, int fontSize, Color color)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void DrawRectangle(Vector2 size, Color color)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void DrawTexture(int id, Color tint)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void EndFrame()
+        {
+            throw new NotImplementedException();
+        }
+
+        public override double GetFrameTime()
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void Initialize(RendererSettings settings)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override int LoadTexture(Texture2d texture)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override int LoadTexture(string path)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void SetTargetFps(int fps)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void SetTransform(Vector2 position, float rotation = 0)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void SetTransform(Matrix4x4 transform)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void SetWindowTitle(string title)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override void SetWindowVSync(bool value)
+        {
+            throw new NotImplementedException();
+        }
+
+        public override bool WindowShouldClose()
+        {
+            throw new NotImplementedException();
+        }
+    }
+}