Longarms Require Wielding (#913)

# Description

Take 1, I hope it's this simple. This is an important balancing feature
that means you can't use longarms (Rifles, Machine Guns, Shotguns, etc.)
without holding them in two hands. I might revisit this later and create
options that can bypass this requirement, but for now this is needed so
that Nukies in EE don't just "Buy Jugsuit, L6, Eshield, Auto-Win".

# Changelog

:cl:
- add: All "Long-arms", Rifles, Light Machine Guns, Shotguns, now
require wielding to use.

Resources/Prototypes/Entities/Objects/Weapons/Guns/LMGs/lmgs.yml

@@ -14,6 +14,7 @@
     slots:
     - Back
   - type: Wieldable
+  - type: GunRequiresWield
   - type: GunWieldBonus
     minAngle: -20
     maxAngle: -20

Resources/Prototypes/Entities/Objects/Weapons/Guns/Rifles/rifles.yml

@@ -14,6 +14,8 @@
     slots:
     - Back
     - suitStorage
+  - type: Wieldable
+  - type: GunRequiresWield
   - type: AmmoCounter
   - type: Gun
     fireRate: 5

Resources/Prototypes/Entities/Objects/Weapons/Guns/Shotguns/shotguns.yml

@@ -77,6 +77,8 @@
     soundEmpty:
       path: /Audio/Weapons/Guns/Empty/empty.ogg
     fireOnDropChance: 0.3
+  - type: Wieldable
+  - type: GunRequiresWield
   - type: ItemSlots
     slots:
       gun_magazine:
@@ -118,6 +120,8 @@
   - type: Gun
     fireRate: 2
     fireOnDropChance: 0.5
+  - type: Wieldable
+  - type: GunRequiresWield
   - type: BallisticAmmoProvider
     capacity: 2
   - type: Construction
@@ -146,6 +150,8 @@
   - type: Clothing
     sprite: DeltaV/Objects/Weapons/Guns/Shotguns/enforcer.rsi # Delta-V
   - type: BallisticAmmoProvider
+  - type: Wieldable
+  - type: GunRequiresWield
 
 - type: entity
   parent: WeaponShotgunEnforcer
@@ -176,6 +182,8 @@
   - type: Tag
     tags:
     - WeaponShotgunKammerer
+  - type: Wieldable
+  - type: GunRequiresWield
 
 - type: entity
   name: sawn-off shotgun
@@ -260,6 +268,8 @@
     capacity: 1
   - type: StaticPrice
     price: 0
+  - type: Wieldable
+  - type: GunRequiresWield
 
 - type: entity
   name: improvised shotgun

Resources/Prototypes/Entities/Objects/Weapons/Guns/Snipers/snipers.yml

@@ -18,6 +18,8 @@
     - Back
     - suitStorage
   - type: AmmoCounter
+  - type: Wieldable
+  - type: GunRequiresWield
   - type: Gun
     fireRate: 0.75
     selectedMode: SemiAuto