update webui and add CLIs

Former-commit-id: 1368dda22ab875914c9dd86ee5146a4f6a4736ad

src/train.py

@@ -0,0 +1,14 @@
+from llmtuner.train.tuner import run_exp
+
+
+def main():
+    run_exp()
+
+
+def _mp_fn(index):
+    # For xla_spawn (TPUs)
+    run_exp()
+
+
+if __name__ == "__main__":
+    main()