Refine rl component bundle

[lihuoran]

Description

• Refine rl_component_bundle. Use a more straightforward & easier way to organize. In this new version, we do not need easyrl anymore.
• Update related examples.
• Fix bugs in distributed training. Add config YAML file for distributed training in CIM scenario.
• Add rl_formulation.ipynb as an example.

Linked issue(s)/Pull request(s)

• issue_number

Type of Change

• [ ] Non-breaking bug fix
• [ ] Breaking bug fix
• [ ] New feature
• [ ] Test
• [ ] Doc update
• [ ] Docker update

Related Component

• [ ] Simulation toolkit
• [ ] RL toolkit
• [ ] Distributed toolkit

Has Been Tested

• OS:
  • [ ] Windows
  • [ ] Mac OS
  • [ ] Linux
• Python version:
  • [ ] 3.7
  • [ ] 3.8
  • [ ] 3.9
• Key information snapshot(s):

Needs Follow Up Actions

• [ ] New release package
• [ ] New docker image

Checklist

• [ ] Add/update the related comments
• [ ] Add/update the related tests
• [ ] Add/update the related documentations
• [ ] Update the dependent downstream modules usage