add audio_manager and code refactoring

core/photo_mode/data/collectible_library.gd

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+class_name CollectibleLibrary
+extends Resource
+
+@export var collectibles: Array[CollectibleResource]

core/photo_mode/data/collectible_library.gd.uid

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+uid://hhuufh87skq5

core/photo_mode/data/collectible_library.tres

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+[gd_resource type="Resource" script_class="CollectibleLibrary" format=3 uid="uid://c6pkpvsvimafb"]
+
+[ext_resource type="Script" uid="uid://bj34o0org55ei" path="res://core/photo_mode/data/collectible_resource.gd" id="1_3cgvf"]
+[ext_resource type="Script" uid="uid://hhuufh87skq5" path="res://core/photo_mode/data/collectible_library.gd" id="2_ggu10"]
+[ext_resource type="Texture2D" uid="uid://cx8d233y32kmu" path="res://icon.svg" id="2_pxmdy"]
+
+[sub_resource type="Resource" id="Resource_3cgvf"]
+script = ExtResource("1_3cgvf")
+id = "cane"
+title = "Cane"
+image = ExtResource("2_pxmdy")
+metadata/_custom_type_script = "uid://bj34o0org55ei"
+
+[sub_resource type="Resource" id="Resource_ggu10"]
+script = ExtResource("1_3cgvf")
+id = "gatto"
+title = "Gatto"
+image = ExtResource("2_pxmdy")
+metadata/_custom_type_script = "uid://bj34o0org55ei"
+
+[sub_resource type="Resource" id="Resource_pxmdy"]
+script = ExtResource("1_3cgvf")
+id = "farfalla"
+title = "Farfalla"
+image = ExtResource("2_pxmdy")
+metadata/_custom_type_script = "uid://bj34o0org55ei"
+
+[resource]
+script = ExtResource("2_ggu10")
+collectibles = Array[ExtResource("1_3cgvf")]([SubResource("Resource_3cgvf"), SubResource("Resource_ggu10"), SubResource("Resource_pxmdy")])
+metadata/_custom_type_script = "uid://hhuufh87skq5"

core/photo_mode/data/collectible_resource.gd

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+class_name CollectibleResource
+extends Resource
+
+@export var id: String
+@export var title: String
+@export var image: Texture2D

core/photo_mode/data/collectible_resource.gd.uid

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+uid://bj34o0org55ei