added night sky and moon

scripts/realtime_day_night_cycle.gd

@@ -6,8 +6,10 @@ extends Node3D
 @export var set_time = 17.0
 @export var north_offset : float
 @export var sun_energy_over_time : Curve
+@export var moon_energy_over_time : Curve
 
 @onready var sun: DirectionalLight3D = $Sun
+@onready var moon: DirectionalLight3D = $Sun/Moon
 
 func _ready() -> void:
 	change_sun()
@@ -17,6 +19,7 @@ func change_sun():
 	sun.rotation.x = sun_details["angle"]
 	sun.rotation.y = north_offset
 	sun.light_energy = sun_details["energy"]
+	moon.light_energy = (2 - sun_details["energy"]) * .25
 
 func sun_angle_from_time():
 	var time_dict = Time.get_time_dict_from_system()