Implement max thread count setting using semaphores

Craftimizer/Windows/Settings.cs

@@ -240,6 +240,22 @@ public class Settings : Window
             ref isDirty
         );
 
+        ImGui.BeginDisabled(config.Algorithm is not (SolverAlgorithm.OneshotForked or SolverAlgorithm.StepwiseForked or SolverAlgorithm.StepwiseFurcated));
+        DrawOption(
+            "Max Core Count",
+            "The number of cores to use when solving. You should use as many\n" +
+            "as you can. If it's too high, it will have an effect on your gameplay\n" +
+            $"experience. A good estimate would be 1 or 2 cores less than your\n" +
+            $"system (FYI, you have {Environment.ProcessorCount} cores,) but\n" +
+            $"make sure to accomodate for any other tasks you have in the\n" +
+            $"background, if you have any.\n" +
+            "(Only used in the Forked and Furcated algorithms)",
+            config.MaxThreadCount,
+            v => config = config with { MaxThreadCount = v },
+            ref isDirty
+        );
+        ImGui.EndDisabled();
+
         ImGui.BeginDisabled(config.Algorithm is not (SolverAlgorithm.OneshotForked or SolverAlgorithm.StepwiseForked or SolverAlgorithm.StepwiseFurcated));
         DrawOption(
             "Fork Count",