feat: engine as library

engine/src/shaders/depth.vs

@@ -0,0 +1,13 @@
+#version 410 core
+
+// Input vertex attributes
+layout (location = 0) in vec3 position;  // Vertex position in local space (model space)
+
+// Uniforms for transformation matrices
+uniform mat4 u_model;       // Model matrix: transforms from local space to world space
+uniform mat4 u_lightSpace;
+
+void main()
+{
+    gl_Position = u_lightSpace * u_model * vec4(position, 1.0);
+}