Fix parallel for jobs not being parallel

Author: emelrad12

JobScheduler/Utils/ParallelForJob.cs

@@ -25,6 +25,7 @@ public static ParallelForHandle Create(int start, int count, Action<int> action,
     {
         scheduler ??= ParallelForJobCommon.GlobalScheduler ?? throw new ArgumentNullException(nameof(scheduler), "JobScheduler cannot be null. Please initialize it before using ParallelForJob.");
         var producer = new ParallelJobProducer<JobProducer>(start, count, new(action), scheduler);
+        producer.CheckAndSplit();
         return new(producer.GetHandle(), scheduler);
     }