Add overdose checks/reagent limits to Auto Injectors

[TDHooligan]

Right now it's possible for inexperienced doctors to overdose people with autoinjectors, wasting a vast amount of resource and harming their patient with said medicine. Limiting the volume of chemicals a player can autoinject would be a nice double whammy to stop accidental overdoses and to gently let a newbie player know that stacking hundreds of units of a medicine is often wasteful & they should let the existing medicine take effect first.

Having this overridable with the harm intent could also let malicious/experienced doctors do this deliberately.

I'm not 100% this is the best solution and i'm up for other suggestions, but I think there should be some in-game reminder that medicine rarely benefits from being in great quantity.