feat: Implement initial version of the Shredder Game

[alilhakshooor]

This commit introduces the core gameplay mechanics for the Shredder Game.

Features added:

• Basic game structure with Pygame window and game loop.
• Falling objects that spawn from the top and move downwards.
• A shredder at the bottom of the screen with visible blades.
• Collision detection between falling objects and shredder blades, removing shredded objects.
• A blade upgrade system for the shredder, allowing you to increase the number of blades by pressing 'U'.
• A scoring system that increments when objects are shredded, with the score displayed on screen.

Unit tests for object movement, shredder upgrades, and collision detection have been added in test_game.py. Note: Execution of these Pygame-dependent tests faced timeouts in the development environment, but the test logic is in place.

Description

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