Add description tooltips to traits, jobs and antagonists (#11661)

Co-authored-by: CommieFlowers <rasmus.cedergren@hotmail.com>

Content.Shared/Roles/AntagPrototype.cs

@@ -10,6 +10,7 @@ namespace Content.Shared.Roles
     {
         private string _name = string.Empty;
         private string _objective = string.Empty;
+        private string? _description = string.Empty;
 
         [ViewVariables]
         [IdDataFieldAttribute]
@@ -25,6 +26,16 @@ namespace Content.Shared.Roles
             private set => _name = Loc.GetString(value);
         }
 
+        /// <summary>
+        ///     The description of this antag shown in a tooltip.
+        /// </summary>
+        [DataField("description")]
+        public string? Description
+        {
+            get => _description;
+            private set => _description = value is null ? null : Loc.GetString(value);
+        }
+
         /// <summary>
         ///     The antag's objective, displayed at round-start to the player.
         /// </summary>

Content.Shared/Roles/JobPrototype.cs

@@ -31,6 +31,15 @@ namespace Content.Shared.Roles
         [ViewVariables(VVAccess.ReadOnly)]
         public string LocalizedName => Loc.GetString(Name);
 
+        /// <summary>
+        ///     The name of this job as displayed to players.
+        /// </summary>
+        [DataField("description")]
+        public string? Description { get; }
+
+        [ViewVariables(VVAccess.ReadOnly)]
+        public string? LocalizedDescription => Description is null ? null : Loc.GetString(Description);
+
         [DataField("requirements")]
         public HashSet<JobRequirement>? Requirements;