Hotfix: NullRef for screenshots in worlds (#5647)

## What does this PR change?
Fixes: 
On desktop pictures taken with Camera Mode are not saved when taken in a World (`NullReferenceExpection` appears in the console). Does not occur on catalyst realms

## How to test the changes?

1. Take screenshot in World
2. Observe it is loaded to Camera Reel

## Our Code Review Standards

https://github.com/decentraland/unity-renderer/blob/master/docs/code-review-standards.md

## Copilot summary

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### <samp>🤖 Generated by Copilot at 847d8f7</samp>

Enhance `ScreenshotMetadata` class with new properties, better scene name logic, and simplified variables. This improves the readability and consistency of the code that handles screenshot metadata.

Author: popuz

unity-renderer/Assets/DCLServices/CameraReelService/ScreenshotMetadata.cs

@@ -17,6 +17,9 @@ public class ScreenshotMetadata
         public Scene scene;
         public VisiblePerson[] visiblePeople;
 
+        private static bool isWorld => DataStore.i.common.isWorld.Get();
+        private static string realmName => DataStore.i.realm.realmName.Get();
+
         public static ScreenshotMetadata Create(DataStore_Player player, IAvatarsLODController avatarsLODController, Camera screenshotCamera)
         {
             Player ownPlayer = player.ownPlayer.Get();
@@ -27,10 +30,10 @@ public static ScreenshotMetadata Create(DataStore_Player player, IAvatarsLODCont
                 userName = UserProfileController.userProfilesCatalog.Get(ownPlayer.id).userName,
                 userAddress = ownPlayer.id,
                 dateTime = DateTimeOffset.UtcNow.ToUnixTimeSeconds().ToString(),
-                realm = DataStore.i.realm.realmName.Get(),
+                realm = realmName,
                 scene = new Scene
                 {
-                    name = MinimapMetadata.GetMetadata().GetSceneInfo(playerPosition.x, playerPosition.y).name,
+                    name = isWorld? $"World {realmName}" : MinimapMetadata.GetMetadata().GetSceneInfo(playerPosition.x, playerPosition.y).name,
                     location = new Location(playerPosition),
                 },
                 visiblePeople = GetVisiblePeoplesMetadata(
@@ -45,11 +48,9 @@ private static VisiblePerson[] GetVisiblePeoplesMetadata(List<Player> visiblePla
             var visiblePeople = new VisiblePerson[visiblePlayers.Count];
             UserProfileDictionary userProfilesCatalog = UserProfileController.userProfilesCatalog;
 
-            UserProfile profile;
-
             for (var i = 0; i < visiblePlayers.Count; i++)
             {
-                profile = userProfilesCatalog.Get(visiblePlayers[i].id);
+                UserProfile profile = userProfilesCatalog.Get(visiblePlayers[i].id);
 
                 visiblePeople[i] = new VisiblePerson
                 {