added sound library settings & command (#12)

## Changes
- Added file base simple sound library
- Added base UI settings and sound library settings
- Added `play_lib_snd` command

## Notes
- The command accepts a namespace so we can leave common sound in the root folder and chapter specific sounds in its own folder

## How to test
- Run the game
- All the door sounds should play as normal.

Reviewed-on: gymkhana/gymkhana#12
Co-authored-by: oier <oierbravo@gmail.com>
Co-committed-by: oier <oierbravo@gmail.com>

project.godot

@@ -500,6 +500,11 @@ _global_script_classes=[ {
 "path": "res://gymkhana/addons/escoria-ui-return-monkey-island/item_outline.gd"
 }, {
 "base": "ESCBaseCommand",
+"class": "PlayLibSound",
+"language": "GDScript",
+"path": "res://gymkhana/addons/escoria-ui-return-monkey-island/esc/commands/play_lib_snd.gd"
+}, {
+"base": "ESCBaseCommand",
 "class": "PlaySndCommand",
 "language": "GDScript",
 "path": "res://addons/escoria-core/game/core-scripts/esc/commands/play_snd.gd"
@@ -534,6 +539,11 @@ _global_script_classes=[ {
 "language": "GDScript",
 "path": "res://gymkhana/addons/escoria-ui-return-monkey-island-dialog-simple/rtmi_dialog_simple_settings.gd"
 }, {
+"base": "Resource",
+"class": "RTMIUiSettings",
+"language": "GDScript",
+"path": "res://gymkhana/addons/escoria-ui-return-monkey-island/rtmi_ui_settings.gd"
+}, {
 "base": "ESCBaseCommand",
 "class": "RandGlobalCommand",
 "language": "GDScript",
@@ -798,6 +808,7 @@ _global_script_class_icons={
 "InventoryAddCommand": "",
 "InventoryRemoveCommand": "",
 "ItemOutline": "res://addons/escoria-core/design/esc_item.svg",
+"PlayLibSound": "",
 "PlaySndCommand": "",
 "PlayVideoCommand": "",
 "PrintCommand": "",
@@ -805,6 +816,7 @@ _global_script_class_icons={
 "QueueResourceCommand": "",
 "RTMISimpleDialogPlugin": "",
 "RTMISimpleDialogSettings": "",
+"RTMIUiSettings": "",
 "RandGlobalCommand": "",
 "RepeatCommand": "",
 "SayCommand": "",
@@ -926,6 +938,7 @@ rtmi_dialog_simple/left_click_action="Speed up"
 rtmi_dialog_simple/stop_talking_animation_on="End of audio"
 debug/enable_hover_stack_viewer=true
 ui/dialogs_chooser="res://addons/escoria-core/game/scenes/dialogs/esc_dialog_options_chooser.gd"
+rtmi_ui/sound_library_folder="res://gymkhana/sounds/"
 
 [input]