Add requirements and CI workflow

[Almehedi06]

Summary

• specify dependencies in requirements.txt
• set up CI workflow using GitHub Actions to run flake8 and pytest on push and PR

Testing

• pytest -q
• flake8 . (fails: command not found)

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https://chatgpt.com/codex/tasks/task_e_684214be5dd48331baf72b244ec26954

[Copilot]

Pull Request Overview

This PR sets up continuous integration infrastructure by adding Python dependencies specification and GitHub Actions workflow for automated testing and linting.

• Adds a CI workflow that runs flake8 linting and pytest testing on pushes to main and pull requests
• Installs dependencies from requirements.txt and adds flake8/pytest as CI-specific dependencies

[Copilot]

[nitpick] Consider testing against multiple Python versions or using a more recent version like '3.11' or '3.12' for better performance and features. Single version testing may miss compatibility issues.

Suggested change

	steps:
	- uses: actions/checkout@v3
	- uses: actions/setup-python@v4
	with:
	python-version: '3.10'
	strategy:
	matrix:
	python-version: [3.10, 3.11, 3.12]
	steps:
	- uses: actions/checkout@v3
	- uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}