Adds mapping support for manual wire directions

[ghost]

Changelog

:cl: add: Mappers can now place cables with manual directions set, for more flexibility /:cl:

About The Pull Request

This pull request creates manual preset wire shapes with their own icons and linked dirs, for more flexibility with mapping in the case where say, two bent wires need to occupy the same tile and not connect.

Why It's Good For The Game

It can allow for mappers to place a much wider variety of wire patterns without worrying if they will connect on the same tile.

[carlopault]

better not break wires or anything +1

[wheezl]

yes