conforms file names to consistant standard

scripts/alert_popup.gd

@@ -0,0 +1,17 @@
+class_name AlertPopup
+extends PanelContainer
+
+signal completed()
+
+func set_popup(prompt_text: String, dismiss_text: String) -> void:
+	$VBoxContainer/Label.text = prompt_text
+	$VBoxContainer/MarginContainerButton.text = dismiss_text
+
+
+func _on_button_pressed() -> void:
+	completed.emit()
+	queue_free()
+
+
+func _on_button_mouse_entered() -> void:
+	$AudioStreamPlayer.play()