Add loglens package files (parsers, cli, config)

loglens/cli/main.py

@@ -1,4 +1,20 @@
+"""Main CLI entry point."""
+
+import sys
+
 from loglens.cli.commands import main
 
+
+def main_cli() -> int:
+    """Main entry point for LogLens CLI."""
+    try:
+        return main(standalone_mode=False)
+    except SystemExit:
+        raise
+    except Exception as e:
+        print(f"Error: {e}", file=sys.stderr)
+        return 1
+
+
 if __name__ == "__main__":
-    main()
+    sys.exit(main_cli())