Update Python support and CI workflow

[esharf]

Updated the project to support Python 3.7+ and modernized the GitHub Actions CI workflow.

Key changes:

1. Python Support: Modified pyproject.toml to specify python = ">=3.7".
2. Dev Dependencies: Used multi-constraint dependency specifications in pyproject.toml to ensure dev tools (pytest, flake8, etc.) remain compatible with Python 3.7 while using the latest versions on Python 3.8+.
3. CI Workflow:
   • Replaced snok/install-poetry with the official installation script as requested.
   • Updated the test matrix to 3.11, 3.12, 3.13, and 3.14.
   • Properly handled the Poetry PATH in GitHub Actions.
   • Updated checkout and setup-python actions to their latest major versions (v4 and v5).
4. Lock File: Updated poetry.lock to reflect these changes.

Verified locally that tests pass and coverage is maintained at 100%.

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PR created automatically by Jules for task 13781581611611862204 started by @esharf

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (d5788a8) to head (521d48e).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master       #26   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            3         3           
  Lines           74        74           
=========================================
  Hits            74        74           

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