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/Components/Mobs/DamageStates.cs

@@ -56,6 +56,11 @@ namespace Content.Server.GameObjects
         {
             return true;
         }
+
+        bool IActionBlocker.CanEmote()
+        {
+            return true;
+        }
     }
 
     /// <summary>
@@ -97,6 +102,11 @@ namespace Content.Server.GameObjects
         {
             return false;
         }
+
+        bool IActionBlocker.CanEmote()
+        {
+            return false;
+        }
     }
 
     /// <summary>
@@ -158,5 +168,10 @@ namespace Content.Server.GameObjects
         {
             return false;
         }
+
+        bool IActionBlocker.CanEmote()
+        {
+            return false;
+        }
     }
 }