[Feature] add cli command serve (#4226)

fastdeploy/__init__.py

@@ -28,7 +28,7 @@ from paddleformers.utils.log import logger as pf_logger
 
 from fastdeploy.engine.sampling_params import SamplingParams
 from fastdeploy.entrypoints.llm import LLM
-from fastdeploy.utils import envs
+from fastdeploy.utils import current_package_version, envs
 
 if envs.FD_DEBUG != "1":
     import logging
@@ -43,6 +43,8 @@ except ImportError:
     pass
 # TODO(tangbinhan): remove this code
 
+__version__ = current_package_version()
+
 
 def _patch_fastsafetensors():
     try: