[freakdaniel]

Summary

Remove redundant checksum assets from releases and verify downloads using GitHub-provided SHA-256 digests with fix of missing desktop and Start menu shortcuts in Windows MSI and EXE installations

Type of Change

• Bug fix
• Documentation update
• Build / CI changes

Related Issues

Fixes #446

Changes

• Remove .sha256 files and SHA256SUMS from release generation and download links
• Update all three command-line installers to use GitHub asset digests and version-specific download URLs
• Add shared desktop and Start menu shortcuts through the MSI used by both Windows installer formats
• Add Windows CI checks for installation, shortcut targets, and uninstall cleanup, with installer logs uploaded as artifacts
• Update English and Russian installation, packaging, and testing documentation

Testing

• Tested on Windows
• Tested on Linux
• Tested on macOS
• Added / updated tests

Checklist

• Code follows the project's style and conventions
• Self-reviewed the diff before submitting
• No unintended files are included (build artifacts, local configs, etc.)
• Documentation updated if needed
• English and Russian documentation describes the same behavior
• Relevant links and code block language metadata verified
• Documentation checks and /Hyprism/docs static export pass