Gun refactor (#8301)

Co-authored-by: Kara <lunarautomaton6@gmail.com>
Co-authored-by: T-Stalker <le0nel_1van@hotmail.com>
Co-authored-by: T-Stalker <43253663+DogZeroX@users.noreply.github.com>
Co-authored-by: ElectroJr <leonsfriedrich@gmail.com>
Co-authored-by: metalgearsloth <metalgearsloth@gmail.com>

Content.Shared/Weapons/Ranged/Systems/SharedGunSystem.Cartridges.cs

@@ -0,0 +1,34 @@
+using Content.Shared.Weapons.Ranged.Components;
+using Robust.Shared.GameStates;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Weapons.Ranged.Systems;
+
+public abstract partial class SharedGunSystem
+{
+    private void InitializeCartridge()
+    {
+        SubscribeLocalEvent<CartridgeAmmoComponent, ComponentGetState>(OnCartridgeGetState);
+        SubscribeLocalEvent<CartridgeAmmoComponent, ComponentHandleState>(OnCartridgeHandleState);
+    }
+
+    private void OnCartridgeHandleState(EntityUid uid, CartridgeAmmoComponent component, ref ComponentHandleState args)
+    {
+        if (args.Current is not CartridgeAmmoComponentState state) return;
+        component.Spent = state.Spent;
+    }
+
+    private void OnCartridgeGetState(EntityUid uid, CartridgeAmmoComponent component, ref ComponentGetState args)
+    {
+        args.State = new CartridgeAmmoComponentState()
+        {
+            Spent = component.Spent,
+        };
+    }
+
+    [Serializable, NetSerializable]
+    private sealed class CartridgeAmmoComponentState : ComponentState
+    {
+        public bool Spent;
+    }
+}