Add hot potato (#14204)

Co-authored-by: AJCM <AJCM@tutanota.com>

Content.Shared/HotPotato/ActiveHotPotatoComponent.cs

@@ -0,0 +1,23 @@
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.HotPotato;
+
+/// <summary>
+/// Added to an activated hot potato. Controls hot potato transfer on server / effect spawning on client.
+/// </summary>
+[RegisterComponent, NetworkedComponent]
+[Access(typeof(SharedHotPotatoSystem))]
+public sealed class ActiveHotPotatoComponent : Component
+{
+    /// <summary>
+    /// Hot potato effect spawn cooldown in seconds
+    /// </summary>
+    [DataField("effectCooldown"), ViewVariables(VVAccess.ReadWrite)]
+    public float EffectCooldown = 0.3f;
+
+    /// <summary>
+    /// Moment in time next effect will be spawned
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite)]
+    public TimeSpan TargetTime = TimeSpan.Zero;
+}