feat: add exitcode handling to command_install.sh

The commit adds a check for the exitcode variable in command_install.sh. If it is empty, it sets it to 0. This change ensures proper handling of the exitcode in the script.

lgsm/modules/command_install.sh

@@ -48,5 +48,8 @@ else
 	fix.sh
 	install_stats.sh
 	install_complete.sh
+	if [ -z "${exitcode}" ]; then
+		exitcode=0
+	fi
 fi
 core_exit.sh