Dive suit manufacture capability for mining fabricators

[Kubius]

[FEAT][BALANCE][GAME OBJECTS]

About the PR

Creates /datum/manufacture/engdivesuit, "Engineering Diving Suit Set", which manufactures precisely that at the same cost as a space suit set.

Introduces said datum to the Mining Fabricator. This exists alongside the space suit manufacture datum instead of replacing it to avoid confusion regarding QM requisitions that ask for a space suit (dive suits also work for this purpose due to acceptance of subtypes, but that wouldn't be immediately clear and makes less sense thematically).

Why's this needed?

Allows for appropriate environmental gear manufacture in underwater maps.

This is most notable for Nadir as proper dive suits provide the best longevity against acid, and they can't currently be manufactured; this is the reason for the Balance tag and major changelog entry.

Changelog

(u)Kubius
(*)Mining fabricators are now capable of manufacturing dive suits while on an underwater map.