Grounding rods that are anchored can be struck two turfs farther away than unanchored. This makes it possible to leapfrog towards a tesla because an unanchored one can be protected in the "shadow" of the anchored one.
* Adds "typecache" utility functions. A fast way to filter lists by type.
Ported from TG
* Ports the "orbit" feature and subsystem from TG
* Adds a feature that allows mobs and objs to "orbit" around some atom. They literally are moved around in circles. See the `orbit` proc in orbit.dm.
* Adds a subsystem that processes the actual movement of orbiting items.
* Adds utility methods for common machinery behavior.
* Adds default_unfasten_wrench which handles the standard anchor/unanchor behavior of wrenches being used on machines. Together with the other default_x_tool machinery procs we can eliminate having that code duplicated in dozens of places!
* Adds is_wire_tool proc to easily detect when a machine is hit with a tool that should open its wires UI (if it has one).
Based on ideas from Paradise, with improvements for us.
* Implements the Tesla Engine
Ported from a mixture of TG and Paradise code and assets: Edison's Bane
Includes the tesla energy ball itself, the generator that makes it, tesla coils, grounding rods, the circuits and frames to build them.
* Switch dusting to zapping on impact and spin better
Ported /tg SpinAnimation which supports more than triangles.
