feat(render): basic normal-based lighting

shaders/shader.vert

@@ -2,14 +2,17 @@
 
 layout(location = 0) in vec3 position;
 layout(location = 1) in vec3 color;
+layout(location = 2) in vec3 normal_in;
 layout(location = 3) in vec2 tex_coords;
 layout(location = 0) out vec2 tex_coord;
+layout(location = 1) out vec3 normal;
 layout(set = 0, binding = 0) uniform UniformBufferObject {
     mat4x4 projection;
 } view;
 void main() {
     gl_Position = view.projection * vec4(position, 1.0);
     tex_coord = tex_coords;
+    normal = normal_in;
     // gl_Position
     // out_color = color;
 }