Update poetry deps to new format

[StingRayZA]

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Title:

• Updates the pyproject.toml section for poetry dev dependencies to the new format

Description:

Updated the pyproject.toml file to the new format required by poetry. This is discussed here

Without this change, the following warning is emitted when running poetry install:

The "poetry.dev-dependencies" section is deprecated and will be removed in a future version. Use "poetry.group.dev.dependencies" instead.

Additional Information:

• Did you add any dependencies or external libraries? No
• Did you modify the documentation? If so, how? No

Checklist:

• I followed the Coding Style Guide: https://peps.python.org/pep-0008/.
• I added clear and concise comments to my code.
• I added unit tests for new features or bug fixes (if applicable).
• I ensured my changes do not introduce regressions.

Optional:

• Issue reference (if related to an existing issue): # (issue number)

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[StingRayZA]

@ranjan-mohanty - this is ready for review when you get a moment :)