feat: Add core map generation and management system

- Introduced MapData, MapGenerator, and MapPainter classes for procedural map generation.
- Implemented LevelManager to handle level initialization and navigation.
- Created TurnManager for managing turn order in a turn-based system.
- Added Player and Enemy character classes with movement and turn-taking capabilities.
- Established pathfinding using AStar2D in PathfindingHandler.
- Integrated new scenes for player and enemy characters, along with world setup.
- Included a new tileset for futuristic Zelda-themed assets.

assets/tilesets/zelda_futuristic.txt

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+Thank you for purchasing my assets! You can find others or games on my itch.io:
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+https://deakcor.itch.io/
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+If you want to contact me or follow my works, you can by following my twitter!
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