feat: Windows Signing

[Rishabh4275]

Description

This PR adds Windows signing steps to the GitHub Actions workflow publish.yml. The workflow now builds the Windows executable, uploads the unsigned installer as an artifact, signs it using SignPath, updates the latest.yml metadata with the signed artifact details, and publishes both the signed executable and updated metadata to a draft release.

Type of Change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Performance improvement
• Code refactoring (no functional changes)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce.
By running the release pipeline and publishing a draft version.

Screenshots

If applicable, add screenshots to help explain your changes.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have tested the app on Mac OS (If not, leave unchecked so we can test before merging)
• I have tested the app on Windows (If not, leave unchecked so we can test before merging)
• I have tested the app on Linux (If not, leave unchecked so we can test before merging)