Feature/rpg 7 combat endpoints

[thsergitox]

Added combat system!

This pull request includes several changes to enhance the project structure, improve code readability, and add new features. The most important changes include adding a changelog, updating the project documentation, configuring a code formatter, and introducing new methods and attributes to the Entity and Monster models.

Documentation and Configuration Updates:

• CHANGELOG.md: Added a comprehensive changelog documenting all notable changes to the project.
• README.md: Updated the README file to include detailed documentation, project structure, and quick start instructions.

Code Formatting:

• .pre-commit-config.yaml: Configured the Black code formatter to ensure consistent code style across the project.

Model Enhancements:

• app/models/entity.py: Added new methods (Attack, Defend, TakeTurn) and attributes (is_defending) to the Entity class to support combat mechanics.
• app/models/monster.py: Implemented the GenerateRandomStats method in the Monster class to generate random stats based on the player's level.

Minor Code Improvements:

• app/database/mongo/queries/player.py: Fixed indentation and renamed a method for consistency. [1] [2]

[A-PachecoT]

Please use pre-commit. Also avoid using rebase and resend the already-on-main changes. We can not accept that many conflicts :(