Makes Exosuit Charging station fully buildable.

Adds the Power port design and circuit.
Changes recharge_station from a turf to a machine with 0 density and Crossed procs. This is also now buildable with a circuit and a design.
Fixes some relative pathing.
idea with spans is to define the type of message rather than how it has to be formatted: <b> is alright but it may be better to use an "important" class for this