[Resupply Module] Handle disposable launchers gracefully

[hbjydev]

Currently, if someone has a loaded disposable launcher, the resupply module will just drop the rockets themselves (i.e. the disposable launcher's ammo) into the crate. This is pointless and unhelpful.

We need to:

1. Check if the launcher is disposable
2. If it is disposable, put a new launcher in there
3. If it's not, put the currently-loaded rounds in there

Quick fix would just be statically adding a number of AT4s into the crate, but I don't really like that idea. It should be clever enough to know how to do it.

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Possible solutions:

• Quick: Keep a set of RHS M136es in the box statically (or based on player count)
• Hard: Maintain a list of class names for disposable launchers and check against that (will be a pain to maintain over time)
• Annoying: Make a function that knows about a few mods' way of doing things (i.e. CBA and RHS) and uses those to determine if the launcher is disposable or not
  • RHS has RHS_isDisposable = 1 on all their disposable launcher weapon classes (configFile >> "CfgWeapons")
  • CBA stores a config containing disposable launchers called CBA_DisposableLaunchers (configFile >> "CBA_DisposableLaunchers").