Avoid modifying sys.path

[shashank-iitbhu]

Contributor checklist

• This pull request is on a separate branch and not the main branch

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Description

This pull request includes refactoring changes that eliminate the modification of sys.path for importing modules, adhering to best coding practices.

Related issue

• Simplify Module Imports by Avoiding Modification of sys.path #122

[github-actions]

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Maintainer checklist

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[shashank-iitbhu]

@andrewtavis this part became redundant now, that's why removed this.

[andrewtavis]

Edited the docs so that it's clear that people should be doing pip install -e . :) Thanks for the research and changes here, @shashank-iitbhu! 🚀