[FEATURE] Migrate to `pyproject.toml`

[rawwar]

Current opensearch-py-ml project uses setup.py and setup.cfg to maintain project metadata. pyproject.toml is the new standard. PEP 621, which was accepted in 2021, designated pyproject.toml as the standard way to specify project metadata for Python packages. setuptools and other packaging tools now support pyproject.toml, and it is expected to become the de facto standard for Python packaging in the future.

pyproject.toml also supports few features that are not available in setup.cfg, such as dynamic metadata and optional dependencies.

Edit-1: Added more information on why to migrate.

[rawwar]

@dhrubo-os , I am willing to raise a PR for this.

[dhrubo-os]

@rawwar Thank you for creating the issue. I would like you to expand this issue description a bit more, such as explaining why we should adopt pyproject.toml and what advantages we will gain over the current process, etc.

[rawwar]

@dhrubo-os , Would you consider this as a major change? I am wondering if we should be doing this migration as part of next major release?

[bilal-aamer]

Hey @rawwar @dhrubo-os, would love to contribute to this migration to pyproject.toml

[rawwar]

@bilal-aamer , that would be great. Please feel free to raise a PR. I would be happy to help and review.

@dhrubo-os , do you think there are any pre-requisites before @bilal-aamer works on it?

[dhrubo-os]

I don't think so. @bilal-aamer thanks for looking into this. Assigned this to you.

[rawwar]

@bilal-aamer , how is it going? If you need any help, please raise a draft PR with whatever you have done so far and I can try to help.

[bilal-aamer]

Hey @rawwar, will do right away been looking into pyproject.toml.

Will get a generic PR out right away.