feat: Qwen2 support

mlx-swift-examples.xcodeproj/xcshareddata/xcschemes/llm-tool.xcscheme

@@ -55,6 +55,10 @@
             argument = "--model mlx-community/CodeLlama-13b-Instruct-hf-4bit-MLX"
             isEnabled = "NO">
          </CommandLineArgument>
+         <CommandLineArgument
+            argument = "--model mlx-community/Qwen1.5-0.5B-Chat-4bit"
+            isEnabled = "YES">
+         </CommandLineArgument>
          <CommandLineArgument
             argument = "--prompt &apos;func sortArray(_ array: [Int]) -&gt; String { &lt;FILL_ME&gt; }&apos;"
             isEnabled = "NO">
@@ -69,7 +73,7 @@
          </CommandLineArgument>
          <CommandLineArgument
             argument = "--model mlx-community/phi-2-hf-4bit-mlx"
-            isEnabled = "YES">
+            isEnabled = "NO">
          </CommandLineArgument>
       </CommandLineArguments>
    </LaunchAction>