Add missing UV coordinates to parametric models ("architecture toolkit")

[ghost]

Scope

• Some Surfaces for parametric models don't have UV coordinates, which breaks texture materials ungracefully

  <a-entity io3d-wall="l:5a; w:0.12;material_top:grass-01;material_front:grass-01;material_back:grass-01" position="35 0 0">
    <a-entity io3d-window="l:1.5;material_frame:cabinet_cherry_veneer;material_glass:cabinet_cherry_veneer" position="1 0.5 0"a></a-entity>
  </a-entity>
  <a-entity io3d-railing="l:5;material_railing:cabinet_cherry_veneer" position="42 0 0"></a-entity>
  <a-entity io3d-stairs="l:5;material_railing:cabinet_cherry_veneer;material_steps:cabinet_cherry_veneer;material_tread:grass-01" position="50 0 0"></a-entity>

• It's literally impossible to have a wooden railing

Behaviour

• Some sort of UV projection proportional to the scale of the parametric models, similar to all the other materials

Implications

• None

[ghost]

I cant get to this right now, PR welcome