Adds linting support to SoundCollectionPrototype, fix linter errors.

Closes #4580

Content.Client/Audio/BackgroundAudioSystem.cs

@@ -126,7 +126,7 @@ namespace Content.Client.Audio
         private void StartAmbience()
         {
             EndAmbience();
-            var file = _robustRandom.Pick(_ambientCollection.PickFiles);
+            var file = _robustRandom.Pick(_ambientCollection.PickFiles).ToString();
             _ambientStream = SoundSystem.Play(Filter.Local(), file, _ambientParams);
         }
 

Content.Server/GameTicking/GameTicker.LobbyMusic.cs

@@ -64,7 +64,7 @@ namespace Content.Server.GameTicking
         public void ChooseRandomLobbySong()
         {
             DebugTools.Assert(_lobbyMusicInitialized);
-            SetLobbySong(_robustRandom.Pick(_lobbyMusicCollection.PickFiles));
+            SetLobbySong(_robustRandom.Pick(_lobbyMusicCollection.PickFiles).ToString());
         }
 
         /// <summary>

Content.Server/GameTicking/GameTicker.RoundFlow.cs

@@ -246,7 +246,7 @@ namespace Content.Server.GameTicking
             RoundNumberMetric.Inc();
 
             RunLevel = GameRunLevel.PreRoundLobby;
-            LobbySong = _robustRandom.Pick(_lobbyMusicCollection.PickFiles);
+            LobbySong = _robustRandom.Pick(_lobbyMusicCollection.PickFiles).ToString();
             ResettingCleanup();
             PreRoundSetup();
 

Content.Shared/Audio/AudioHelpers.cs

@@ -55,7 +55,7 @@ namespace Content.Shared.Audio
         public static string GetRandomFileFromSoundCollection(string name)
         {
             var soundCollection = IoCManager.Resolve<IPrototypeManager>().Index<SoundCollectionPrototype>(name);
-            return IoCManager.Resolve<IRobustRandom>().Pick(soundCollection.PickFiles);
+            return IoCManager.Resolve<IRobustRandom>().Pick(soundCollection.PickFiles).ToString();
         }
     }
 }

Content.Shared/Audio/SoundCollectionPrototype.cs

@@ -1,6 +1,7 @@
 using System.Collections.Generic;
 using Robust.Shared.Prototypes;
 using Robust.Shared.Serialization.Manager.Attributes;
+using Robust.Shared.Utility;
 using Robust.Shared.ViewVariables;
 
 namespace Content.Shared.Audio
@@ -12,6 +13,7 @@ namespace Content.Shared.Audio
         [DataField("id", required: true)]
         public string ID { get; } = default!;
 
-        [DataField("files")] public List<string> PickFiles { get; } = new();
+        [DataField("files")]
+        public List<ResourcePath> PickFiles { get; } = new();
     }
 }

Resources/Prototypes/SoundCollections/footsteps.yml

@@ -55,11 +55,10 @@
 - type: soundCollection
   id: footstep_tile
   files:
-  - /Audio/Effects/Footsteps/tile1.ogg
-  - /Audio/Effects/Footsteps/tile2.ogg
-  - /Audio/Effects/Footsteps/tile3.ogg
-  - /Audio/Effects/Footsteps/tile4.ogg
-  - /Audio/Effects/Footsteps/tile5.ogg
+  - /Audio/Effects/Footsteps/tile1.wav
+  - /Audio/Effects/Footsteps/tile2.wav
+  - /Audio/Effects/Footsteps/tile3.wav
+  - /Audio/Effects/Footsteps/tile4.wav
 
 - type: soundCollection
   id: footstep_clown

Resources/Prototypes/SoundCollections/screams.yml

@@ -20,9 +20,9 @@
 - type: soundCollection
   id: ScientistScreams
   files:
-    - /Audio/Voice/Human/science_scream_1.ogg
-    - /Audio/Voice/Human/science_scream_2.ogg
-    - /Audio/Voice/Human/science_scream_3.ogg
-    - /Audio/Voice/Human/science_scream_4.ogg
-    - /Audio/Voice/Human/science_scream_5.ogg
-    - /Audio/Voice/Human/science_scream_6.ogg
+    - /Audio/Voice/Human/science_scream1.ogg
+    - /Audio/Voice/Human/science_scream2.ogg
+    - /Audio/Voice/Human/science_scream3.ogg
+    - /Audio/Voice/Human/science_scream4.ogg
+    - /Audio/Voice/Human/science_scream5.ogg
+    - /Audio/Voice/Human/science_scream6.ogg