feat: Add Logrus package challenge series

[LeeFred3042U]

Description

This PR introduces a comprehensive, four-part package challenge series for the logrus structured logging library. It fulfills all the requirements outlined in issue #474, providing a complete learning path from beginner concepts to advanced, production-ready logging patterns

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Summary of Changes

• Adds a new package directory: packages/logrus/
• Implements four progressive challenges, each in its own sub-directory
  • Challenge 1: Basic Logging & Levels (Beginner)
  • Challenge 2: Structured Logging & Fields (Intermediate)
  • Challenge 3: Advanced Configuration & Hooks (Intermediate)
  • Challenge 4: Production Logging Patterns (Advanced)
• Each challenge is self-contained and includes the full set of required files: README.md, learning.md, hints.md, solution-template.go, solution-template_test.go, metadata.json, go.mod/go.sum, and run_tests.sh
• Adds the top-level package.json metadata file to register the logrus challenge series with the learning platform

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Key Highlights

• Progressive Learning Curve: The series is designed to guide users from basic logger setup to advanced architectural patterns like custom hooks and multi-destination logging
• Production-Focused: The later challenges introduce real-world concepts like correlation IDs, custom hooks for alerting, and the principles behind centralized logging with systems like the ELK stack
• Comprehensive Educational Content: Each challenge includes a detailed learning.md file and a hints.md file to provide a rich, supportive learning experience
• Robustly Tested: Every challenge is accompanied by a comprehensive test suite to validate the user's implementation against all requirements

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Self-Review Checklist

• [x] This PR resolves issue #474
• [x] All 4 challenges have been implemented with the complete file structure
• [x] The package.json metadata file is included and complete
• [x] The code adheres to the repository's style and contribution guidelines
• [x] All automated tests are passing