Change local import structure to package mode, ignore built files

Author: XkunW

.gitignore

@@ -151,4 +151,7 @@ slurm/
 scripts/
 
 # vLLM bug reporting files
-collect_env.py
+collect_env.py
+
+# build files
+dist/

vec_inf/cli/_cli.py

@@ -6,7 +6,7 @@
 from rich.columns import Columns
 from rich.panel import Panel
 
-from _utils import *
+from ._utils import *
 
 
 CONSOLE = Console()