Luix v1.4.1 - Wally Hotfix

Regenerate Wally types — Windows PowerShell + Defender fix

The Regenerate Wally types button (and the
luix.wally.regenerateTypes command) chained its three steps with
&&, which Windows PowerShell 5.1 — the default shell on Windows —
rejects as an invalid statement separator, so the command failed
before wally install even started.

• Shell-aware chaining. On Windows PowerShell 5.1 the chain
  is now emitted as cmd1; if ($?) { cmd2; … }. PowerShell 7+,
  cmd.exe, and POSIX shells continue to use &&.
• 300 → 1500 ms breather between wally install and
  rojo sourcemap. Windows Defender briefly locks the freshly
  written Packages/*.lua link files for real-time scanning. Without
  a pause, rojo's sourcemap silently misses them and
  wally-package-types then reports Linker node 'Packages/X.lua' not found in sourcemap for every top-level package. The delay is
  emitted in the active shell's syntax (Start-Sleep /
  timeout /nobreak / sleep).