Build the game as a standalone Windows .exe (PyInstaller)

[martymcenroe]

Bundle the open-source calibration game (tkinter, pure stdlib) from src/silphe/ into a standalone Windows .exe — the prerequisite for every non-PyPI lane (direct download, winget, Microsoft Store).

Notes

• PyInstaller one-file build of silphe.calibrate:main (and maybe silphe.arc:main), bundling tkinter.
• App icon, one-file vs one-dir, smoke-test on a clean Windows box (no Python installed).
• Output feeds GitHub Releases / the thrivetech download.
• Must be code-signed (see the cert issue) or Windows SmartScreen scares regular users.

Sibling lanes: thrivetech download, winget (#TBD), Microsoft Store (#15), PyPI (silphe-play).

[martymcenroe]

Ready-to-run build

poetry add --group dev pyinstaller
poetry run pyinstaller --onefile --windowed --name silphe-play \
  --collect-submodules silphe src/silphe/calibrate.py

• --windowed = no console; --onefile = a single dist/silphe-play.exe; --collect-submodules silphe pulls in the package modules. tkinter bundles automatically.
• Smoke-test on a clean Windows box (no Python installed): dist/silphe-play.exe should open the green garden.
• Then sign it (Choose + procure a Windows code-signing certificate (one for the whole fleet) #18), attach to a GitHub Release, and point winget (Publish the game to winget (Windows Package Manager) #17) at it.

Left as an operator-run step because it opens a GUI window to verify.