add upload_plan.py

csst_dag/cli/upload_plan.py

@@ -7,5 +7,5 @@ import os
 plan_path = sys.argv[1]
 assert os.path.exists(plan_path), f"Plan file {plan_path} does not exist"
 
-res = plan.write_file(local_file="plan.json")
+res = plan.write_file(local_file=plan_path)
 print(res)