Add AutoEmote comp/system, updates to zombie code (#13932)

* Add AutoEmote comp/system

* Reduce groan chance so it's the same as before

Old code did 0.2 and then 0.5, now it's just one Prob(0.1)

* Fix typo, curTime var, don't log Resolve

* Maybe fix pausing?

* Fix mistake

* Update NextEmoteTime if an auto emote is removed

* Fix stuff

Get CurTime outside update loop
Use MapInit instead of ComponentInit
Fix a typo in a comment
Debug assert prototype ID in RemoveEmote
Do += PausedTime in OnUnpaused
Add prototype as arg to ResetTimer to avoid an indexing

Content.Shared/Chat/Prototypes/AutoEmotePrototype.cs

@@ -0,0 +1,43 @@
+namespace Content.Shared.Chat.Prototypes;
+
+using Robust.Shared.Prototypes;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+
+[Prototype("autoEmote")]
+public sealed class AutoEmotePrototype : IPrototype
+{
+    /// <inheritdoc/>
+    [IdDataField]
+    public string ID { get; } = default!;
+
+    /// <summary>
+    /// The ID of the emote prototype.
+    /// </summary>
+    [DataField("emote", required: true, customTypeSerializer: typeof(PrototypeIdSerializer<EmotePrototype>))]
+    public string EmoteId = String.Empty;
+
+    /// <summary>
+    /// How often an attempt at the emote will be made.
+    /// </summary>
+    [DataField("interval", required: true)]
+    public TimeSpan Interval;
+
+    /// <summary>
+    /// Probability of performing the emote each interval.
+    /// <summary>
+    [DataField("chance")]
+    public float Chance = 1;
+
+    /// <summary>
+    /// Also send the emote in chat.
+    /// <summary>
+    [DataField("withChat")]
+    public bool WithChat = true;
+
+    /// <summary>
+    /// Hide the chat message from the chat window, only showing the popup.
+    /// This does nothing if WithChat is false.
+    /// <summary>
+    [DataField("hiddenFromChatWindow")]
+    public bool HiddenFromChatWindow = false;
+}