add carp hardsuit for traitors (#25155)

* FactionClothing

* swtich carp to the Dragon faction

* add carp hardsuit

* add carp hardsuit to uplink

* fixes

* webedit ops 1

* why did i name it that wtf

* among

---------

Co-authored-by: deltanedas <@deltanedas:kde.org>

Content.Shared/Clothing/Components/FactionClothingComponent.cs

@@ -0,0 +1,27 @@
+using Content.Shared.Clothing.EntitySystems;
+using Content.Shared.NPC.Prototypes;
+using Robust.Shared.GameStates;
+using Robust.Shared.Prototypes;
+
+namespace Content.Shared.Clothing.Components;
+
+/// <summary>
+/// When equipped, adds the wearer to a faction.
+/// When removed, removes the wearer from a faction.
+/// </summary>
+[RegisterComponent, NetworkedComponent, Access(typeof(FactionClothingSystem))]
+public sealed partial class FactionClothingComponent : Component
+{
+    /// <summary>
+    /// Faction to add and remove.
+    /// </summary>
+    [DataField(required: true)]
+    public ProtoId<NpcFactionPrototype> Faction = string.Empty;
+
+    /// <summary>
+    /// If true, the wearer was already part of the faction.
+    /// This prevents wrongly removing them after removing the item.
+    /// </summary>
+    [DataField]
+    public bool AlreadyMember;
+}

Content.Shared/Clothing/EntitySystems/FactionClothingSystem.cs

@@ -0,0 +1,42 @@
+using Content.Shared.Clothing.Components;
+using Content.Shared.Inventory.Events;
+using Content.Shared.NPC.Components;
+using Content.Shared.NPC.Systems;
+
+namespace Content.Shared.Clothing.EntitySystems;
+
+/// <summary>
+/// Handles <see cref="FactionClothingComponent"/> faction adding and removal.
+/// </summary>
+public sealed class FactionClothingSystem : EntitySystem
+{
+    [Dependency] private readonly NpcFactionSystem _faction = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<FactionClothingComponent, GotEquippedEvent>(OnEquipped);
+        SubscribeLocalEvent<FactionClothingComponent, GotUnequippedEvent>(OnUnequipped);
+    }
+
+    private void OnEquipped(Entity<FactionClothingComponent> ent, ref GotEquippedEvent args)
+    {
+        TryComp<NpcFactionMemberComponent>(args.Equipee, out var factionComp);
+        var faction = (args.Equipee, factionComp);
+        ent.Comp.AlreadyMember = _faction.IsMember(faction, ent.Comp.Faction);
+
+        _faction.AddFaction(faction, ent.Comp.Faction);
+    }
+
+    private void OnUnequipped(Entity<FactionClothingComponent> ent, ref GotUnequippedEvent args)
+    {
+        if (ent.Comp.AlreadyMember)
+        {
+            ent.Comp.AlreadyMember = false;
+            return;
+        }
+
+        _faction.RemoveFaction(args.Equipee, ent.Comp.Faction);
+    }
+}