Added Docstrings and Updated manual_control.py

[BolunDai0216]

Description

• Added docstrings to all of the environments.
• Updated manual_control.py to work with the new render(), step() and reset()

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist:

• I have run the pre-commit checks with pre-commit run --all-files (see CONTRIBUTING.md instructions to set it up)
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[pseudo-rnd-thoughts]

Looks good to me, @BolunDai0216 Do you want me to merge?

[BolunDai0216]

Looks good to me, @BolunDai0216 Do you want me to merge?

Yes, you can merge it.