Update demos for Godot 4.4

- Resave all files with Godot 4.4 to make use of script/shader UIDs.
- Use AgX tonemapping in all demos that used a tonemapper other than Linear.

loading/autoload/global.gd.uid

@@ -0,0 +1 @@
+uid://ckpav307n5x6t

loading/autoload/project.godot

@@ -14,7 +14,7 @@ config/name="Autoload (Singletons)"
 config/description="This demo shows how to use autoloads to change between scenes."
 config/tags=PackedStringArray("best_practices", "demo", "official")
 run/main_scene="res://scene_a.tscn"
-config/features=PackedStringArray("4.2")
+config/features=PackedStringArray("4.4")
 run/low_processor_mode=true
 config/icon="res://icon.webp"
 

loading/autoload/scene_a.gd.uid

@@ -0,0 +1 @@
+uid://q7akmme21y0k

loading/autoload/scene_a.tscn

@@ -1,6 +1,6 @@
 [gd_scene load_steps=2 format=3 uid="uid://6xgdg1bmya7c"]
 
-[ext_resource type="Script" path="res://scene_a.gd" id="1"]
+[ext_resource type="Script" uid="uid://q7akmme21y0k" path="res://scene_a.gd" id="1"]
 
 [node name="SceneA" type="Panel"]
 anchors_preset = 15

loading/autoload/scene_b.gd.uid

@@ -0,0 +1 @@
+uid://b1mph1gwcg8l8

loading/autoload/scene_b.tscn

@@ -1,6 +1,6 @@
 [gd_scene load_steps=2 format=3 uid="uid://cmu1caqo7k7wy"]
 
-[ext_resource type="Script" path="res://scene_b.gd" id="1"]
+[ext_resource type="Script" uid="uid://b1mph1gwcg8l8" path="res://scene_b.gd" id="1"]
 
 [node name="SceneB" type="Panel"]
 anchors_preset = 15