feat(AudioTheme): add support for audio/sfx themes

assets/audio/themes/default.tres

@@ -0,0 +1,10 @@
+[gd_resource type="Resource" script_class="AudioTheme" load_steps=2 format=3 uid="uid://d70xost7hk1i"]
+
+[ext_resource type="Script" path="res://core/systems/audio/audio_theme.gd" id="1_7ff30"]
+
+[resource]
+script = ExtResource("1_7ff30")
+intro = ""
+focus = "res://assets/audio/interface/536764__egomassive__toss.ogg"
+select = "res://assets/audio/interface/96127__bmaczero__contact1.ogg"
+open_menu = ""

assets/editor-icons/icon-park-outline--sound-wave.svg.import

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+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://brtu0g62ohgn1"
+path="res://.godot/imported/icon-park-outline--sound-wave.svg-6694d7867012105e482585279d7a4c37.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://assets/editor-icons/icon-park-outline--sound-wave.svg"
+dest_files=["res://.godot/imported/icon-park-outline--sound-wave.svg-6694d7867012105e482585279d7a4c37.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1
+svg/scale=1.0
+editor/scale_with_editor_scale=false
+editor/convert_colors_with_editor_theme=false

core/systems/audio/audio_theme.gd

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+@icon("res://assets/editor-icons/icon-park-outline--sound-wave.svg")
+extends Resource
+class_name AudioTheme
+
+## Resource for customizing the UI audio sounds
+
+@export_category("General")
+## Unique name of the audio theme
+@export var name: String
+
+@export_category("Global")
+## Sounds to play when OpenGamepadUI first launches
+@export_file("*.ogg") var intro := ""
+## Sound to play when volume is increased
+@export_file("*.ogg") var audio_volume_up := ""
+## Sound to play when volume is decreased
+@export_file("*.ogg") var audio_volume_down := ""
+## Ambient background music to play in menus
+@export_file("*.ogg") var ambient_music := ""
+## Sound to play when a notification is displayed
+@export_file("*.ogg") var notification_display := ""
+
+@export_category("Side Menus")
+## Sound to play when side menus (Main menu and QB menu) open
+@export_file("*.ogg") var side_menu_open := ""
+## Sound to play when side menus (Main menu and QB menu) close
+@export_file("*.ogg") var side_menu_close := ""
+
+@export_category("Button")
+## Sound to play when button is focused
+@export_file("*.ogg") var button_focus := "res://assets/audio/interface/536764__egomassive__toss.ogg"
+## Sound to play when button is selected
+@export_file("*.ogg") var button_select := "res://assets/audio/interface/96127__bmaczero__contact1.ogg"
+
+@export_category("Slider")
+## Sound to play when slider is focused
+@export_file("*.ogg") var slider_focus := "res://assets/audio/interface/536764__egomassive__toss.ogg"
+## Sound to play when slider value changes
+@export_file("*.ogg") var slider_change := ""
+
+@export_category("Toggle")
+## Sound to play when toggle is focused
+@export_file("*.ogg") var toggle_focus := "res://assets/audio/interface/536764__egomassive__toss.ogg"
+## Sound to play when toggle value changes
+@export_file("*.ogg") var toggle_change := ""