v3.0.5

Re-release of 3.0.4 with a build-pipeline fix: the published 3.0.4 wheels
shipped without the WinPTY DLL (x64) and without any native binaries at all
(arm64), making them unusable.

Fixes

• Rust cdylib renamed winpty → _winpty to avoid maturin de-duping the
  colliding winpty.dll C library that lives in the same wheel directory.
• arm64 release workflow now strips *.dll/*.exe from .gitignore so the
  NuGet-downloaded ConPTY binaries (conpty.dll, OpenConsole.exe) actually
  land in the arm64 wheel.
• Release upload step replaced deprecated maturin publish with
  maturin build --release + twine upload. Pinned twine>=6.1 and
  pkginfo>=1.12 so the upload accepts the Metadata 2.4 license-file
  field that current maturin emits.
• Added a pre-upload sanity check (.github/scripts/check_wheel.py) that
  verifies every expected binary is present in the wheel before it is sent
  to PyPI.
• Added a Wheel preflight CI workflow that exercises the full wheel
  build + sanity check on x64 and arm64 on every push to main, so the
  same packaging regression cannot slip out again unnoticed.