add version check (#498)

Author: mikekgfb

cli.py

@@ -295,7 +295,12 @@ def _add_arguments_common(parser):
 
 
 def arg_init(args):
-    if hasattr(args, "quantize") and Path(args.quantize).is_file():
+    if not (torch.__version__ > "2.3"):
+        raise RuntimeError(
+            "You are using PyTorch {torch.__version__}. At this time, torchchat uses the latest PyTorch technology with high-performance kernels only available in PyTorch nightly until the PyTorch 2.4 release"
+        )
+
+    if hasattr(args, 'quantize') and Path(args.quantize).is_file():
         with open(args.quantize, "r") as f:
             args.quantize = json.loads(f.read())