feat: username.txt & cleanup file output

Minecraft.Client/Common/Buildsteps/Xbox-postbuild.ps1

@@ -45,6 +45,17 @@ $fileCopies = @(
 	@{ Source = "Common\Tutorial\Tutorial";     Dest = "Tutorial\Tutorial" }
 )
 
+$deleteDirs = @(
+    "Common\res\TitleUpdate\GameRules"
+)
+
+foreach ($dir in $deleteDirs) {
+    $path = Join-Path $OutDir $dir
+    if (Test-Path $path) {
+        Remove-Item $path -Recurse -Force -ErrorAction SilentlyContinue
+    }
+}
+
 foreach ($copy in $fileCopies) {
     $src = Join-Path $ProjectDir $copy.Source
     $dst = Join-Path $OutDir $copy.Dest