Add slang shaders for tessellation samples

shaders/slang/tessellation/base.slang

@@ -0,0 +1,46 @@
+/* Copyright (c) 2025, Sascha Willems
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+struct VSInput
+{
+    float3 Pos;
+    float3 Normal;
+    float2 UV;
+};
+
+struct VSOutput
+{
+    float4 Pos : SV_POSITION;
+    float3 Normal;
+    float2 UV;
+};
+
+struct DSOutput
+{
+	float3 Normal;
+	float2 UV;
+};
+
+[[vk::binding(0, 1)]] Sampler2D samplerColorMap;
+
+[shader("vertex")]
+VSOutput vertexMain(VSInput input)
+{
+    VSOutput output;
+    output.Pos = float4(input.Pos.xyz, 1.0);
+    output.Normal = input.Normal;
+    output.UV = input.UV;
+    return output;
+}
+
+[shader("fragment")]
+float4 fragmentMain(DSOutput input)
+{
+	float3 N = normalize(input.Normal);
+    float3 L = normalize(float3(0.0, -4.0, 4.0));
+    float4 color = samplerColorMap.Sample(input.UV);
+	return float4(clamp(max(dot(N,L), 0.0), 0.2, 1.0) * color.rgb * 1.5, 1);
+}