Feat: complete migration from print calls to logging module

[mnietona]

Description

This PR fully addresses issue #267 by replacing all standard print() calls with the Python logging module across the entire codebase.

Technical Changes

• Core Logging Engine: Configured a robust LOGGING dictionary in www/settings.py.
• UI Integration: Implemented rich.logging.RichHandler to ensure that logs coexist gracefully with the rich progress bars used in scraping commands.
• Full Migration:
  • Migrated all management commands in catalog/ (load_tree, load_courses, clean_archives, find_orphans, crawl_uv, download_programs, etc.).
  • Migrated the background tasks in documents/tasks.py (crucial for Celery monitoring).
  • Cleaned up internal parsers and www/settings.py warning messages.
• Verification: Ran a project-wide grep to ensure zero remaining print() calls.

Quality Control

• All changes are formatted according to project standards (black, isort).
• All GitHub Actions checks (build & pre-commit) are passing.

Fixes #267

[C4ptainCrunch]

Thank you for your PR :)
Seems good to me, besides my 2 comments 👍

For the next ones, could you write a shorter more meaningful description ? Here most of the text does not bring me useful info, sometimes it's because it's evident (eg: CI is passing), sometimes because it lacks explanations (what is a "robust LOGGING dict" ?), sometimes it's redundant (you say twice that it fixes #267)