ci: add Python workflow for lint and tests

[german-boop]

This workflow installs Python 3.10, sets up necessary dependencies, checks code quality using Flake8, and tests the greeting app with pytest.

Both push triggers and pull request events trigger it to the main branch.

This procedure guarantees automatic execution of code quality checks and basic tests for the project.

Summary by CodeRabbit

• Chores
  • Added automated continuous integration pipeline with Python code linting and test execution to ensure code quality and reliability.

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[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

A new GitHub Actions workflow is introduced to automate continuous integration on the main branch. The workflow performs checkout, Python 3.10 setup, dependency installation, code linting with flake8, and test execution with pytest on pushes and pull requests.

Changes

Cohort / File(s)	Summary
CI/CD Workflow Configuration .github/workflows/python-app.yml	New GitHub Actions workflow that runs on pushes and PRs to main. Includes Python 3.10 setup, pip/flake8/pytest installation, two-stage flake8 linting (strict and standard), and pytest test execution.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 A workflow takes shape, so crisp and so clean,
GitHub Actions now guards every scene,
Linting and testing, both passing with cheer,
Quality flowing throughout the year! ✨

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📜 Recent review details

Configuration used: defaults

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 18f8236 and 2986fc1.

📒 Files selected for processing (1)

• .github/workflows/python-app.yml

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