Add dynamic VFX mesh buffers, Skyline drift effects, and branch updater.

Expose append-only mesh buffers for mod skid/smoke rendering, sync rear-wheel VFX over multiplayer, rebuild Skyline audio assets, and let the updater install from any CI branch.

Co-authored-by: Cursor <[email protected]>

scripts/Launch.ps1

@@ -20,6 +20,21 @@ Prepared assets folder is missing:
 
 Dev launch expects converted Skate 3 assets there (often via junction/symlink to an installed copy's assets).
 Release packages run setup from support\skate3setup.exe instead of --assets.
+"@
+    }
+    try {
+        $null = [System.IO.Directory]::EnumerateFileSystemEntries($assetsPath)
+    } catch {
+        $item = Get-Item -LiteralPath $assetsPath -Force
+        $target = if ($item.LinkType) { $item.Target } else { $assetsPath }
+        throw @"
+Assets path exists but cannot be opened (broken junction or missing target):
+  $assetsPath
+  -> $target
+
+Re-point assets to a valid installation, for example:
+  rmdir "$assetsPath"
+  mklink /J "$assetsPath" "C:\path\to\skate3rust-windows-x64\data\installations\<id>\assets"
 "@
     }
     $argumentList = '--assets "' + $assetsPath + '"'