add RoHe

[CoincidenceBoy]

Description

Checklist

Please feel free to remove inapplicable items for your PR.

• [ ] The PR title starts with [$CATEGORY] (such as [NN], [Model], [Doc], [Feature]])
• [x] Changes are complete (i.e. I finished coding on this PR)
• [x] All changes have test coverage
• [x] Code is well-documented
• [x] To the best of my knowledge, examples are either not affected by this change, or have been fixed to be compatible with this change
• [ ] Related issue is referred in this PR
• [x] If the PR is for a new model/paper, I've updated the example index here.

Changes

1. config.py & config.ini
2. experiment.py
   • Experiment.field: specific_trainerflow

3. trainerflow/

   1. __init.py

      • SUPPORTED_FLOWS
      • from .RoHe_trainer import RoHeTrainer

   2. RoHe_trainer.py

      • RoHeTrainer
4. modules/
   1. __init.py
      • SUPPORTED_MODELS
      • from .RoHe import RoHe
   2. RoHe.py
      • RoHe