Fix/python file import extraction

[jassem-manita]

Description

Fixes #(issue)

Type of Change

• Bug fix (non-breaking change which fixes an issue)

Changes Made

• Improved import extraction for .py files (no longer treats each line as a requirement)
• Fixed standard library detection logic (only true stdlib modules classified as such)
• Now detects and offers to install missing third-party packages (e.g., matplotlib)

Testing

• All existing tests pass
• Manual testing performed

Test Commands Run

pytest tests/
flake8 midna/ tests/
black --check midna/ tests/

Code Quality Checklist

• Code follows the project's style guidelines (Black, isort, Flake8)
• Self-review of code completed
• Code is commented where necessary
• Docstrings added/updated (Google-style format)
• No new warnings generated
• Commit messages follow conventional commits format

Documentation

• README updated (if needed)
• CONTRIBUTING.md updated (if needed)
• Docstrings updated
• Comments added for complex logic

Checklist Before Merge

• PR title follows conventional commits format
• All CI checks pass
• Code reviewed by at least one maintainer
• Branch is up to date with main
• No merge conflicts

[codecov]

Codecov Report

❌ Patch coverage is 11.11111% with 8 lines in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
midna/core.py	12.50%	7 Missing ⚠️
midna/package_classifier.py	0.00%	1 Missing ⚠️

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