chore(docs): clean up and fix imports and initialization in README

[JRudransh]

Description

Changes are based on openfga-sdk==0.4.0

1. Wherever we are using some modules from the openfga_sdk I have imported them and keep them as comments.
2. I found some syntax errors in existing code, so i fixed them
3. I have reformatted the code
4. I have added return statement on main function from there we are doing some query

References

#28

Review Checklist

• I have clicked on "allow edits by maintainers".
• I have added documentation for new/changed functionality in this PR or in a PR to openfga.dev [Provide a link to any relevant PRs in the references section above]
• The correct base branch is being used, if not main
• I have added tests to validate that the change in functionality is working as expected

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: JRudransh / name: Rudransh Jagannath (a3ceb2a)

[JRudransh]

Everything seems good

[JRudransh]

This PR Also covers #23, I was not aware that we have different Issue for that

[rhamzeh]

Thanks for your PR @JRudransh!

Can I ask you to:

• Sign the EasyCLA in the comment above (we need it in order to merge)
• amend your commit message to be chore(docs): clean up and fix imports and initialization in README and force push?

Marking as "Request Changes" so that we don't merge before EasyCLA is signed

[JRudransh]

I have already signed the EasyCLA, I have also got the conformation email

[JRudransh]

I have added required changes

[rhamzeh]

Thank you!