Create a `RenderWindow` class to manage Pygame initialization

[dmccoystephenson]

Patchwork should provide a RenderWindow class that encapsulates Pygame setup logic and manages the window, surface, event loop, and frame rate.

The class should be designed for composition, not inheritance, so that clients like Apex can use it as a container for rendering rather than subclassing it.

Key Features

• Initialize Pygame with title and window size
• Expose get_surface(), tick(fps), and should_continue() methods
• Allow registration of custom event handlers with register_event_handler(handler)
• Call each handler on events, while handling QUIT internally

This enables modular, flexible use in multiple projects.