Added a settings menu

client/ui/settings/RenderScale.gd

@@ -0,0 +1,20 @@
+extends OptionButton
+
+var fsrQuality: Array[float] = [0.50, 0.59, 0.67, 0.77, 1.0]
+
+func _ready():
+	var viewport_scale := get_viewport().scaling_3d_scale
+	var closest := -1
+	var closest_diff := 999.0
+
+	for index in range(item_count):
+		var diff: float = abs(viewport_scale - fsrQuality[index])
+
+		if diff < closest_diff:
+			closest = index
+			closest_diff = diff
+	
+	selected = closest
+
+func on_item_selected(index):
+	get_viewport().scaling_3d_scale = fsrQuality[index]