Give kammerer tighter spread so it's not a complete downgrade to the enforcer (#37616)

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

@@ -0,0 +1,16 @@
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Weapons.Ranged.Components;
+
+/// <summary>
+/// This component modifies the spread of the gun it is attached to.
+/// </summary>
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState]
+public sealed partial class GunSpreadModifierComponent: Component
+{
+    /// <summary>
+    /// A scalar value multiplied by the spread built into the ammo itself.
+    /// </summary>
+    [DataField, AutoNetworkedField]
+    public float Spread = 1;
+}

Content.Shared/Weapons/Ranged/Systems/GunSpreadModifierSystem.cs

@@ -0,0 +1,30 @@
+using Content.Shared.Examine;
+using Content.Shared.Weapons.Ranged.Components;
+using Content.Shared.Weapons.Ranged.Events;
+
+namespace Content.Shared.Weapons.Ranged.Systems;
+
+
+public sealed class GunSpreadModifierSystem: EntitySystem
+{
+    public override void Initialize()
+    {
+        base.Initialize();
+        SubscribeLocalEvent<GunSpreadModifierComponent, GunGetAmmoSpreadEvent>(OnGunGetAmmoSpread);
+        SubscribeLocalEvent<GunSpreadModifierComponent, ExaminedEvent>(OnExamine);
+    }
+
+    private void OnGunGetAmmoSpread(EntityUid uid, GunSpreadModifierComponent comp, ref GunGetAmmoSpreadEvent args)
+    {
+        args.Spread *= comp.Spread;
+    }
+
+    private void OnExamine(EntityUid uid, GunSpreadModifierComponent comp, ExaminedEvent args)
+    {
+        var percentage = Math.Round(comp.Spread * 100);
+        var loc = percentage < 100 ? "examine-gun-spread-modifier-reduction" : "examine-gun-spread-modifier-increase";
+        percentage = percentage < 100 ? 100 - percentage : percentage - 100;
+        var msg = Loc.GetString(loc, ("percentage", percentage));
+        args.PushMarkup(msg);
+    }
+}