Adds /me command. (#414)

* Adds /me command.

* Update Content.Server/Chat/ChatManager.cs

Co-Authored-By: Pieter-Jan Briers <pieterjan.briers@gmail.com>

Content.Server/GameObjects/EntitySystems/ActionBlockerSystem.cs

@@ -14,6 +14,8 @@ namespace Content.Server.GameObjects.EntitySystems
         bool CanThrow();
 
         bool CanSpeak();
+
+        bool CanEmote();
     }
 
     public class ActionBlockerSystem : EntitySystem
@@ -67,5 +69,17 @@ namespace Content.Server.GameObjects.EntitySystems
             }
             return canspeak;
         }
+
+        public static bool CanEmote(IEntity entity)
+        {
+            bool canemote = true;
+
+            foreach (var actionblockercomponents in entity.GetAllComponents<IActionBlocker>())
+            {
+                canemote &= actionblockercomponents.CanEmote();
+            }
+
+            return canemote;
+        }
     }
 }