Melee refactor (#10897)

Co-authored-by: metalgearsloth <metalgearsloth@gmail.com>

Content.Server/Weapons/Ranged/Systems/GunSystem.Ballistic.cs

@@ -0,0 +1,31 @@
+using Content.Shared.Weapons.Ranged.Components;
+using Robust.Shared.Map;
+
+namespace Content.Server.Weapons.Ranged.Systems;
+
+public sealed partial class GunSystem
+{
+    protected override void Cycle(BallisticAmmoProviderComponent component, MapCoordinates coordinates)
+    {
+        EntityUid? ent = null;
+
+        // TODO: Combine with TakeAmmo
+        if (component.Entities.Count > 0)
+        {
+            var existing = component.Entities[^1];
+            component.Entities.RemoveAt(component.Entities.Count - 1);
+
+            component.Container.Remove(existing);
+            EnsureComp<AmmoComponent>(existing);
+        }
+        else if (component.UnspawnedCount > 0)
+        {
+            component.UnspawnedCount--;
+            ent = Spawn(component.FillProto, coordinates);
+            EnsureComp<AmmoComponent>(ent.Value);
+        }
+
+        if (ent != null)
+            EjectCartridge(ent.Value);
+    }
+}