Feature/text aug mapper

[HYLcool]

• New OPs: simple text augmentation OPs for en/zh; aggregate several augmentation methods in each OP
  • They are also updated in the config_all.yaml with augmentation examples.
• Config Optimization:
  • A new argument export_in_parallel to control whether to export the result dataset into a single file in parallel. It's disabled by default.
  • The input config file will be backed up in the work directory for further usage.
  • Data-Juicer will display the config table before starting the processing for better management of the current running tasks.

[yxdyc]

Good job. Plz see the inline comments