Add Separation Charges

[SlamBamActionman]

Separation Charges are a wire type that go along the edge of tiles and allow the user to split a grid in two.

The charges must support a few functions:

• It must be able to tell that it will in fact split a grid in two; some control needs to be made when activated that it won't make a cut in a grid that is still connected elsewhere.
• Placing it should not be so fast as to make it trivial to disconnect station infrastructure. Refer to the RCD as an example.

These can be made available to Salvagers in the salvage vendor to see how players abuse use them.

Further description of its purpose can be found in the Salvage Rework Proposal.