[Feature] Implement quests Django App

[karastoyanov]

✨ Feature Description

Create a new Django app called quests within the Skill Forge Backend monolith to handle all quest-related functionality. This app will replace the existing microservice architecture currently hosted at skill_forge_quests, consolidating backend logic into the main Django project for better maintainability and integration.

🧩 Problem Statement

The current quest system is implemented as a standalone Flask microservice, which introduces complexity in deployment, communication overhead, and fragmented data handling.

💡 Proposed Solution

• Scaffold a new Django app named quests inside the main Skill Forge backend.
• Migrate core models, serializers, views, and business logic from the microservice to the new app.
• Refactor API endpoints to align with Django REST Framework conventions.
• Integrate quest logic with existing user and progress tracking systems.
• Ensure compatibility with JWT-based authentication and permission classes.
• Write unit and integration tests to validate functionality.
• Deprecate the microservice once parity is achieved.

🔗 Related Issues / Links

• N.A.

📋 Additional Context

• The new logic should be completly integrated with Piston API service used to execute user's code.
• All code executions should be saved in the backend database
• User progress should be considered(XP points, ranks, levels)