Standardizes JSON output: depth, UTF-8, key order

- Sorts top-level config keys before serialization for deterministic files and cleaner diffs.
- Increases JSON depth to 10 to retain nested settings.
- Writes JSON as UTF-8 via Set-Content for consistent encoding.
- Applies across config export and UI save flows.

FFUDevelopment/BuildFFUVM.ps1

@@ -4004,7 +4004,7 @@ function Export-ConfigFile {
     }
     
     # Convert to JSON and save
-    $orderedParams | ConvertTo-Json | Out-File $ExportConfigFile -Force
+    $orderedParams | ConvertTo-Json -Depth 10 | Set-Content -Path $ExportConfigFile -Encoding UTF8
 }
 function Get-PEArchitecture {
     param(