Proto-kinetic crusher (#16277)

Co-authored-by: AJCM-git <60196617+AJCM-git@users.noreply.github.com>

Content.Server/Gatherable/GatherableSystem.Projectile.cs

@@ -17,12 +17,16 @@ public sealed partial class GatherableSystem
     {
         if (!args.OtherFixture.Hard ||
             args.OurFixture.ID != SharedProjectileSystem.ProjectileFixture ||
+            component.Amount <= 0 ||
             !TryComp<GatherableComponent>(args.OtherEntity, out var gatherable))
         {
             return;
         }
 
         Gather(args.OtherEntity, uid, gatherable);
-        QueueDel(uid);
+        component.Amount--;
+
+        if (component.Amount <= 0)
+            QueueDel(uid);
     }
 }