Status effect refactor (#4868)

* Oops! All Changes In One Commit

* try desperately to fix prediction issues and fail

* oops

* test

* actually fixes prediction issues

* port jittering to status effect

* default merge behavior + alert cooldown stuff

* silly test issue

* zabloing

* address reviews

Content.Shared/StatusEffect/StatusEffectsComponent.cs

@@ -0,0 +1,63 @@
+using System;
+using System.Collections.Generic;
+using Robust.Shared.Analyzers;
+using Robust.Shared.GameObjects;
+using Robust.Shared.GameStates;
+using Robust.Shared.Serialization;
+using Robust.Shared.Serialization.Manager.Attributes;
+
+namespace Content.Shared.StatusEffect
+{
+    [RegisterComponent]
+    [NetworkedComponent]
+    [Friend(typeof(StatusEffectsSystem))]
+    public class StatusEffectsComponent : Component
+    {
+        public override string Name => "StatusEffects";
+
+        public Dictionary<string, StatusEffectState> ActiveEffects = new();
+
+        /// <summary>
+        ///     A list of status effect IDs to be allowed
+        /// </summary>
+        [DataField("allowed", required: true)]
+        public List<string> AllowedEffects = default!;
+    }
+
+    /// <summary>
+    ///     Holds information about an active status effect.
+    /// </summary>
+    [Serializable, NetSerializable]
+    public class StatusEffectState
+    {
+        /// <summary>
+        ///     The start and end times of the status effect.
+        /// </summary>
+        public (TimeSpan, TimeSpan) Cooldown;
+
+        /// <summary>
+        ///     The name of the relevant component that
+        ///     was added alongside the effect, if any.
+        /// </summary>
+        public string? RelevantComponent;
+
+        public StatusEffectState((TimeSpan, TimeSpan) cooldown, string? relevantComponent=null)
+        {
+            Cooldown = cooldown;
+            RelevantComponent = relevantComponent;
+        }
+    }
+
+    [Serializable, NetSerializable]
+    public class StatusEffectsComponentState : ComponentState
+    {
+        public Dictionary<string, StatusEffectState> ActiveEffects;
+        public List<string> AllowedEffects;
+
+        public StatusEffectsComponentState(Dictionary<string, StatusEffectState> activeEffects, List<string> allowedEffects)
+        {
+            ActiveEffects = activeEffects;
+            AllowedEffects = allowedEffects;
+        }
+    }
+}