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.

managers/turn_manager.gd

@@ -0,0 +1,61 @@
+## TurnManager.gd
+# Autoload singleton for managing turn order in a turn-based game.
+# Handles registration, sequencing, and signaling for all turn-taking entities.
+extends Node
+
+# List of entities that participate in the turn order (e.g., Player, Enemies).
+var turn_entities: Array[Node] = []
+# Index of the entity whose turn is currently active.
+var current_index: int = 0
+# Whether the turn system is currently running.
+var active: bool = false
+
+# Registers an entity to participate in the turn order.
+# Ensures no duplicates.
+func register_entity(entity: Node) -> void:
+	if entity not in turn_entities:
+		turn_entities.append(entity)
+
+# Unregisters an entity (e.g., when it is removed or defeated).
+func unregister_entity(entity: Node) -> void:
+	if entity in turn_entities:
+		turn_entities.erase(entity)
+
+# Starts the turn sequence for all registered entities.
+# Resets the index and begins the first turn.
+func start_turns() -> void:
+	if turn_entities.size() == 0:
+		return
+	active = true
+	current_index = 0
+	_next_turn()
+
+# Advances to the next entity's turn.
+# Connects to the entity's turn_finished signal and calls its take_turn() method.
+func _next_turn() -> void:
+	if not active or turn_entities.size() == 0:
+		return
+	if current_index >= turn_entities.size():
+		current_index = 0 # New round
+	# Get the next entity in the list.
+	var entity: Node = turn_entities[current_index]
+	# Connect to the entity's turn_finished signal if not already connected.
+	if not entity.is_connected("turn_finished", Callable(self, "_on_entity_turn_finished")):
+		entity.connect("turn_finished", Callable(self, "_on_entity_turn_finished"))
+	# Notify the entity to take its turn.
+	entity.take_turn()
+
+# Called when an entity finishes its turn (emits turn_finished).
+# Disconnects the signal and advances to the next entity.
+func _on_entity_turn_finished() -> void:
+	# Disconnect to avoid duplicate connections.
+	var entity: Node = turn_entities[current_index]
+	if entity.is_connected("turn_finished", Callable(self, "_on_entity_turn_finished")):
+		entity.disconnect("turn_finished", Callable(self, "_on_entity_turn_finished"))
+	current_index += 1
+	_next_turn()
+
+# Optionally, stops the turn sequence and resets state.
+func stop_turns() -> void:
+	active = false
+	current_index = 0