Added Documentation to the queries.py file

[pahuja-gor]

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name: Added documentation to queries.py about: Added documentation to queries.py labels: structural

This pull request closes #issue_number_here .

- What I did Added documentation to each of the classes/constructors in queries.py

- How I did it N/A

- How to verify it

N/A

• [ ] I updated the docs.

This pull request adds a new feature to libra. @Palashio, could you please take a look at it?