Organize imports and work on integrating lighting

frontend/src/shaders/passthrough-shading-vs.glsl

@@ -0,0 +1,10 @@
+#version 300 es
+
+uniform mat3 ndcToWorld;
+in vec4 a_position;
+out vec2 worldCoordinates;
+
+void main() {
+    worldCoordinates = (vec3(a_position.xy, 1.0) * ndcToWorld).xy;
+    gl_Position = a_position;
+}