Update ci.yaml

[Roshmita-viswa]

[!IMPORTANT] Update CI workflow to use Poetry and Tox for testing across Python versions 3.10, 3.11, and 3.12, with improved setup and dependency management.

• Workflow Name:
  • Renamed to Tox + Poetry CI (All Python Versions).
• Triggers:
  • Added pyproject.toml and poetry.lock to paths for push events.
• Setup:
  • Updated actions/checkout to v4 and actions/setup-python to v5.
  • Python versions 3.10, 3.11, 3.12 used in matrix.
• Dependencies:
  • Installs poetry and tox==4.15.0.
  • Configures Poetry to create and use in-project virtual environments.
  • Installs dependencies with Poetry, regenerating lock file if outdated.
• Testing:
  • Runs tests with pytest via Poetry.
  • Runs tests with Tox for multi-environment support.
• Misc:
  • Codecov upload step commented out for future use.

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