Add shading for shapes and the floor

shader/shape/basic.vert

@@ -1,11 +1,14 @@
 #version 450 core
 layout (location = 0) in vec4 pos;
 layout (location = 1) in vec4 col;
+layout (location = 2) in vec4 norm;
 layout (std140, binding = 0) uniform TheMat { mat4 theMat; } ;
 out vec4 vCol;
 out vec4 vPos;
+out vec4 vNorm;
 void main() {
   gl_Position = theMat * vec4(pos.xyz,1);
   vCol = col;
   vPos = pos;
+  vNorm = norm;
 }