Add interaction to inventory holders

[Dystopian]

When merged this pull request will:

• add Inventory interaction to inventory holders: dead bodies and dropped weapons/gear;
• add Inventory interaction to unconscious men;
• add Drag/Carry actions to dropped gear and Carry to dead body weapons;
• reformat and optimize ace_dragging_fnc_canCarry and ace_dragging_fnc_canDrag.

Now it's much easier to take gear from several bodies/weapons lying close to each other.

TODO:

• take weapon/mag
• adjust action position
• drag/carry
• cargo load
• setting to disable ?

WIP

[Dystopian]

Unfortunately dropped from dead body weapons (class WeaponHolderSimulated) are bad when drag/carry: they can just disappear (looks like they go far under ground), so I had to enable drag menu for dropped gear only.

BTW possibility to take weapon from unconscious enemy is amazing ;)

[Dystopian]

Dead body weapons can be carried now (with small workaround).
Cargo loading and moving gear to another vehicle gear have too many troubles to fix so I decided not implement them.

This is done, please review.

[654wak654]

Moving towards a future without the action menu, one PR at a time 👍

[jonpas]

Just took a brief look at it, seems a very short solution for what it does! 👍

[severgun]

Moving whole weaponholder seems weird for me and far from "realism" theme of ACE3 mod.
You can drop tonns of ammo on a ground and then carry it around in hands.

[dedmen]

^ I agree. Also picking up a invisible force matrix that holds the items together seems.. Not right.
I can see it looking acceptable for a single weapon. But even then you might aswell just pick it up.

Also the last couple games I played I tried several times to find the "open inventory" action on a dead body and wondered why I couldn't find it. Completely forgot that this isn't merged and released already.

[Dystopian]

@severgun you can't drop tonns of ammo on a ground and then carry it

@dedmen I think I do can hold some magazines and weapons in hands. I think this is not really big difference from other objects carrying.

[dedmen]

you can't drop tonns of ammo on a ground and then carry it

What prevents you from doing that?

[Dystopian]

https://github.com/acemod/ACE3/blob/master/addons/dragging/functions/fnc_getWeight.sqf

[dedmen]

So.. Nothing does?
You still can carry as much as with boxes, just without the box now then.
Hm. Okey.

[10Dozen]

Is it possible to allow player to run when e.g. only 2 items are in hands and total weight is about <=10-15 kg? Like - to pick 2 AT-4 from truck and run back to positions, instead of walking/finding big backpack. Stamina drain may be at the same level, as it's harder to keep balance.

[Dystopian]

Is it possible to allow player to run when e.g. only 2 items are in hands and total weight is about <=10-15 kg?

I will try to implement this in other PR.

[LinkIsGrim]

Works, including MP. Functionality and performance are fine, but see Dystopian#2 for code suggestions.

Also, there's a double-up when using this with disarming:

But that should be fixed after merging.