Shotgun spread refactor (#27773)

* Moves spread data to new component

* Refactors shotgun spread code

* Makes shotgun cartridges and projectiles use new component

* Attempts to fix nullable build error

* Fixes hitscan weapons that I broke :(

* Saviour commit?

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Co-authored-by: EmoGarbage404 <retron404@gmail.com>

Content.Shared/Weapons/Ranged/Components/AmmoComponent.cs

@@ -30,18 +30,6 @@ public sealed partial class CartridgeAmmoComponent : AmmoComponent
     [AutoNetworkedField]
     public bool Spent = false;
 
-    /// <summary>
-    /// How much the ammo spreads when shot, in degrees. Does nothing if count is 0.
-    /// </summary>
-    [ViewVariables(VVAccess.ReadWrite), DataField("spread")]
-    public Angle Spread = Angle.FromDegrees(5);
-
-    /// <summary>
-    /// How many prototypes are spawned when shot.
-    /// </summary>
-    [ViewVariables(VVAccess.ReadWrite), DataField("count")]
-    public int Count = 1;
-
     /// <summary>
     /// Caseless ammunition.
     /// </summary>