Debug arg parsing error while launching the app & Contribute Initial Documentation

[sora-ryu]

Purpose

1. Address the error mentioned on Viz tool integration #301
2. Replace README.md with official documentation page

Type of change

What types of change is it?
Select the appropriate type(s) that describe this PR

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (non-backwards-compatible fix or feature)
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Documentation update
• Maintenance update
• Other (please describe)

Testing

Explain the steps needed to test the new code to verify that it does indeed address the issue and produce the expected behavior.

Checklist

Put an x in the boxes that apply.

• I have run existing tests which pass locally with my changes
• I have added new tests or examples that prove my fix is effective or that my feature works
• I have added necessary documentation

[dzalkind]

Thanks @sora-ryu! When you are ready to merge this, can you assign a reviewer?

[sora-ryu]

Documentation is finally ready to review! @dzalkind and @mayankchetan , please let me know if any further improvements would be needed.

[dzalkind]

How does this documentation work with the WEIS readthedocs that already exists?

[sora-ryu]

I thought we are having separate documentation for Viz tool. Do you want me to include it into existing WEIS docs?

[sora-ryu]

Added this WEIS Viz documentation to the existing WEIS documentation, not keeping separate.

[mayankchetan]

Looks good to me. Thank you for moving it to the main docs