Please offer a way to exclude dirs in addition to the default exclusions

Please offer a way to exclude dirs in addition to the default exclusions: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). I needed to exclude one auto-generated file so I naively specified --exclude thefile.py . Unfortunately that disabled the useful standard…

The task

I needed to exclude one auto-generated file so I naively specified `--exclude thefile.py`. Unfortunately that disabled the useful standard exclusions, which I did not realize until it broke a unit test running on Jenkins.

Part of FineEnvs/MiMo-V2.6-RL-harbor-code.