Move ChatSystem.Emotes to shared (#40866)

* move to shared

* entity effect to shared

* refactor: whitespaces+xml-doc typo fixups

* refactor: a little bit more of xml-doc typos fixups

---------

Co-authored-by: pa.pecherskij <pa.pecherskij@interfax.ru>

Content.Shared/Speech/EntitySystems/EmoteBlockerSystem.cs

@@ -0,0 +1,41 @@
+using Content.Shared.Chat;
+using Content.Shared.Inventory;
+using Content.Shared.Speech.Components;
+
+namespace Content.Shared.Speech.EntitySystems;
+
+public sealed class EmoteBlockerSystem : EntitySystem
+{
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<EmoteBlockerComponent, BeforeEmoteEvent>(OnEmoteEvent);
+        SubscribeLocalEvent<EmoteBlockerComponent, InventoryRelayedEvent<BeforeEmoteEvent>>(OnRelayedEmoteEvent);
+    }
+
+    private static void OnRelayedEmoteEvent(Entity<EmoteBlockerComponent> entity, ref InventoryRelayedEvent<BeforeEmoteEvent> args)
+    {
+        OnEmoteEvent(entity, ref args.Args);
+    }
+
+    private static void OnEmoteEvent(Entity<EmoteBlockerComponent> entity, ref BeforeEmoteEvent args)
+    {
+        if (entity.Comp.BlocksEmotes.Contains(args.Emote))
+        {
+            args.Cancel();
+            args.Blocker = entity;
+            return;
+        }
+
+        foreach (var blockedCat in entity.Comp.BlocksCategories)
+        {
+            if (blockedCat == args.Emote.Category)
+            {
+                args.Cancel();
+                args.Blocker = entity;
+                return;
+            }
+        }
+    }
+}