Saltern: Add antimatter and singularity engine rooms (#2757)
Saltern: Add antimatter and singularity engine rooms (#2757)

* Saltern: Add antimatter engine (north-east of engineering) and singularity engine (south of gravgen) areas.

* Saltern: Add a spare emitter and some AME fuel to the room that looks like it's for spare parts

* Reapplied firelock PR

map merge driver when

Co-authored-by: Metal Gear Sloth <5a6002283f4d0ed17bed24ee1f9d131baf85176c@gmail.com>
Co-authored-by: metalgearsloth <27cc5532143359f4f0a07538959588b08ac8861f@users.noreply.github.com>
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