Add DayController and QueueController to handle spawning of customer through out a day

Scenes/queue_controller.gd

@@ -0,0 +1,49 @@
+extends Node3D
+
+@export var queue_patience: float = 120
+
+@export var progress_bar_3d: ProgressBar3D
+@export var label_3d: Label3D
+
+
+var _customers: Array[float] = [] # Temp. Array of their patience
+
+
+func _ready() -> void:
+	progress_bar_3d.override_fill_color(Color.YELLOW)
+	progress_bar_3d.exponential = true
+	Signals.request_customer_spawn.connect(_on_request_customer_spawn)
+	Signals.consumed_customer.connect(on_consumed_customer)
+
+func _on_request_customer_spawn() -> void:
+	spawn_customer()
+
+
+func on_consumed_customer() -> void:
+	_customers.pop_front()
+
+
+func spawn_customer()  -> void:
+	_customers.append(queue_patience)
+
+
+func _process(delta: float) -> void:
+	# Process customers patience
+	for i in range(0, _customers.size()):
+		_customers[i] -= delta
+		if _customers[i] <= 0:
+			GameManager.game_over()
+
+	# Try to assign customers to tables
+	for customer in _customers:
+		get_tree().call_group("table", "try_consume_customer") 
+
+
+	# Update visuals
+	if not _customers.is_empty():
+		label_3d.text = "Customers in queue: " +  str(_customers.size())
+		progress_bar_3d.set_progress(_customers.front() / queue_patience)
+	else:
+		progress_bar_3d.set_progress(0)
+		label_3d.text = "No Customers"
+