Add peridaxon autoinjectors to squad medic prep

[Derpislav]

Summary (a quick, 2-3 sentence summary): What it says on the tin.

Benefits (How this will benefit the server and game as a whole): The only reason I get marines dying is lung damage from friendly fire, and guess what? I'm not allowed to fix it because "you're a field medic, anything under the skin is black magic for you". That's bullshit and actual field medics either know how to ghetto fix lungs, or are issued special patches that let the wounded breathe and avoid lung collapse. But we can't have nice things, so peridaxon injectors are the closest thing.

Details (Description of how you think this would work, the benefits, etc): Add it to the vendors.

Implementation (Optional, if you have an idea how to implement it): Add it to the vendors.

[Surrealistik]

+1. The dev team seems pretty hostile to any kind of suggestion that makes things easier for medics and doctors I've noticed, minor map changes aside; though I support this, I don't think it'll happen.

[xywenx00]

+1 That would probably safe alot of people.

[Jeser]

Yes, we need something to do with damage from friendly fire. And it SHOULD be solveable in field.

[The_Mockingjay_]

If you are nice to the medbay staff they will pretty much make you anything you want at the start of the round, but this would be useful. +1