Issue #31: Implement Windows 10/11 Release Packaging (MSI + Portable EXE)

[SSobol77]

Problem Description

Currently, ECLI provides .deb, .rpm, and (planned) macOS + PyPI distributions, but there is no official release process for Windows 10/11. This prevents adoption among a large developer base and enterprise users working on Windows environments.

Proposed Solution

Extend the packaging strategy to support native Windows installers and portable builds:

* Build Process

• Use PyInstaller to generate a standalone .exe (portable binary).

• Create an .msi installer (or NSIS-based installer) with:

  • Proper Start Menu shortcuts
  • Uninstaller support
  • Installation into C:\Program Files\ECLI\

• CI/CD Integration

  • Add a windows-latest job to GitHub Actions.
  • Automate code signing with a provided certificate (if available).
  • Upload .exe and .msi artifacts to GitHub Releases.

Acceptance Criteria

• make package-windows produces both a portable .exe and an MSI installer.
• The package runs correctly on Windows 10 and Windows 11 (x86_64, ARM64 optional).
• The MSI installer properly registers/unregisters ECLI in Windows Programs & Features.
• Other packaging workflows (.deb, .rpm, macOS, PyPI) remain unaffected.