Render basic geometry

Added GraphicsContext, SwapChain, Buffer, VertexBuffer, IndexBuffer and a basic DX11 implementation.

Sandbox/content/basicShader.hlsl

@@ -0,0 +1,25 @@
+struct VS_IN
+{
+    float3 Position : POSITION;
+    float4 Color    : COLOR;
+};
+
+struct PS_IN
+{
+    float4 Position : SV_POSITION;
+    float4 Color    : COLOR;
+};
+
+PS_IN VS(VS_IN input)
+{
+    PS_IN output;
+    output.Position = float4(input.Position, 1);
+    output.Color = input.Color;
+    
+    return output;
+}
+
+float4 PS(PS_IN input) : SV_TARGET
+{
+    return input.Color;
+}

Sandbox/src/SandboxApp.bf

@@ -4,6 +4,7 @@ using GlitchyEngine.Events;
 using System.Diagnostics;
 using GlitchLog;
 using GlitchyEngine.ImGui;
+using ImGui;
 
 namespace Sandbox
 {
@@ -29,9 +30,9 @@ namespace Sandbox
 
 		private bool OnImGuiRender(ImGuiRenderEvent e)
 		{
-			ImGui.ImGui.Begin("Test");
+			ImGui.Begin("Test");
 
-			ImGui.ImGui.End();
+			ImGui.End();
 
 			return false;
 		}