Enhanced modularization and core feature porting

[louis-e]

• Modularization: Separated core logic into dedicated modules (world_editor, args, data_processing, block_definitions) for better maintainability.
• Bresenham Algorithm: Implemented efficient block placement for drawing lines in 3D space.
• Block Definitions: Centralized block constants for cleaner and reusable block references.
• Input Argument Parsing: Integrated clap for robust command-line argument handling, including dynamic path and bounding box inputs.
• File Structure: Refined file organization to support scalability and easier navigation.