New copper doors, trapdoors, ladders and platforms

To expand the use of copper, I propose a few new copper blocks, with new mechanical and aesthetic uses

Copper doors/trapdoors- They can be opened normally, but become locked when powered by redstone

Copper ladder- A slightly faster climbing speed, but at a higher cost

Copper platform- A platform made of iron bars surrounded with copper, they are half a block tall, a mesh with a copper frame around it. They will have a very cool industrial look and allow liquids to go through them, could be useful in steampunky builds, factories or as drains