SMES (de)construction
- Adds Superconducting Magnetic Coils - SMES specific construction item.
- Each SMES can have up to 5 additional coils added , similar to PSUs with cells.
- It is possible to create multi coil SMESs by changing "cur_coils" variable while mapping them in.
- SMES can be deconstructed, salvaging their board and coil(s)
- It is currently not possible to obtain these by any other way than deconstructing existing SMESs. This will be added in another commit.