Added slang shaders for compute cull and lod sample

Adjusted vertex bindings

shaders/slang/computecullandlod/indirectdraw.slang

@@ -0,0 +1,56 @@
+/* Copyright (c) 2025, Sascha Willems
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+struct VSInput
+{
+    float4 Pos : POSITION0;
+    float3 Normal;
+    float3 Color;
+    // Instanced attributes
+    float3 instancePos;
+    float instanceScale;    
+};
+
+struct VSOutput
+{
+    float4 Pos : SV_POSITION;
+    float3 Normal;
+    float3 Color;
+    float3 ViewVec;
+    float3 LightVec;
+};
+
+struct UBO
+{
+    float4x4 projection;
+    float4x4 modelview;
+};
+ConstantBuffer<UBO> ubo;
+
+[shader("vertex")]
+VSOutput vertexMain(VSInput input)
+{
+    VSOutput output;
+    output.Color = input.Color;
+    output.Normal = input.Normal;
+    float4 pos = float4((input.Pos.xyz * input.instanceScale) + input.instancePos, 1.0);
+    output.Pos = mul(ubo.projection, mul(ubo.modelview, pos));
+    float4 wPos = mul(ubo.modelview, float4(pos.xyz, 1.0));
+    float4 lPos = float4(0.0, 10.0, 50.0, 1.0);
+    output.LightVec = lPos.xyz - pos.xyz;
+    output.ViewVec = -pos.xyz;
+    return output;
+}
+
+[shader("fragment")]
+float4 fragmentMain(VSOutput input)
+{
+	float3 N = normalize(input.Normal);
+	float3 L = normalize(input.LightVec);
+	float3 ambient = float3(0.25, 0.25, 0.25);
+	float3 diffuse = max(dot(N, L), 0.0).xxx;
+	return float4((ambient + diffuse) * input.Color, 1.0);
+}