Add Job preference tests (#28625)

* Misc Job related changes

* Add JobTest

* A

* Aa

* Lets not confuse the yaml linter

* fixes

* a

Content.Shared/Roles/JobPrototype.cs

@@ -63,8 +63,8 @@ namespace Content.Shared.Roles
         public bool CanBeAntag { get; private set; } = true;
 
         /// <summary>
-        ///     Whether this job is a head.
-        ///     The job system will try to pick heads before other jobs on the same priority level.
+        ///     The "weight" or importance of this job. If this number is large, the job system will assign this job
+        ///     before assigning other jobs.
         /// </summary>
         [DataField("weight")]
         public int Weight { get; private set; }