shaders: Implement HLSL for lessons 2-8

src/shaders/lesson2.hlsl

@@ -0,0 +1,31 @@
+/*
+ * SPDX-FileCopyrightText: (C) 2025 a dinosaur
+ * SPDX-License-Identifier: Zlib
+ */
+
+struct VertexInput
+{
+	float3 position : TEXCOORD0;
+};
+
+cbuffer VertexUniform : register(b0, space1)
+{
+	float4x4 viewproj : packoffset(c0);
+};
+
+struct Vertex2Pixel
+{
+	float4 position : SV_Position;
+};
+
+Vertex2Pixel VertexMain(VertexInput input)
+{
+	Vertex2Pixel output;
+	output.position = mul(viewproj, float4(input.position, 1.0));
+	return output;
+}
+
+half4 PixelMain(Vertex2Pixel input) : SV_Target0
+{
+	return half4(1.0, 1.0, 1.0, 1.0);
+}