feat: basic settings menu

src/UI/buttons/container_selection_button.gd

@@ -0,0 +1,21 @@
+class_name ContainerSelectionButton extends MarginContainer
+
+@export var button: Button
+@export var container_box: ContainerBox
+
+var button_index: int
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	pass
+
+
+func _enter_tree() -> void:
+	var text: String = "Collection %d" % container_box.container_id
+	button_index = container_box.container_id
+	button.text = text
+	
+## Request to change to a panel with the ID - 1 of the button. [br]
+## Buttons are 1-indexed, while [member UIManager.panel_array] is 0-index
+func _on_button_pressed() -> void:
+	SignalBus.on_panel_requested.emit(button_index-1)