Fixes#15812
Firesuit sprites taken directly from Paradise Station
(https://github.com/ParadiseSS13/Paradise/pull/26671). However, my own
modifications were needed for the emissive sprites, the helmet sprites,
and the atmospheric technician sprites.
### Asset Licenses
The following assets that **have not** been created by myself are
included in this PR:
| Path | Original Author | License |
| --- | --- | --- |
| icons/clothing/kit/firefighter.dmi |
[ElorgRHG](https://github.com/ElorgRHG) (Paradise Station) | CC-BY-SA
3.0 |
6584089d63