fix: unkown version

psa_car_controller/__init__.py

@@ -1,9 +1,12 @@
 import sys
+
 if sys.version_info >= (3, 8):
     from importlib import metadata
 else:
     import importlib_metadata as metadata
-
-__version__ = metadata.version(__package__)
+try:
+    __version__ = metadata.version(__package__)
+except metadata.PackageNotFoundError:
+    __version__ = "unknown"
 
 del metadata, sys