Add slang shaders for headless samples

shaders/slang/computeheadless/headless.slang

@@ -0,0 +1,34 @@
+/* Copyright (c) 2025, Sascha Willems
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+RWStructuredBuffer<uint> values;
+
+[[SpecializationConstant]] const uint BUFFER_ELEMENTS = 32;
+
+uint fibonacci(uint n) {
+	if(n <= 1){
+		return n;
+	}
+	uint curr = 1;
+	uint prev = 1;
+	for(uint i = 2; i < n; ++i) {
+		uint temp = curr;
+		curr += prev;
+		prev = temp;
+	}
+	return curr;
+}
+
+[numthreads(1, 1, 1)]
+[shader("compute")]
+void computeMain(uint3 GlobalInvocationID : SV_DispatchThreadID)
+{
+	uint index = GlobalInvocationID.x;
+	if (index >= BUFFER_ELEMENTS)
+		return;
+	values[index] = fibonacci(values[index]);
+}
+