Signing MAC and Windows binaries

[igorpecovnik]

Ref:

• Signing for MacOS - https://v2.tauri.app/distribute/sign/macos/
• Signing for Windows https://signpath.org/

[SuperKali]

In addition, to use AppImage, we need also sign the app, or continue to use deb files.

[SuperKali]

Added signature to MacOS application today

[SuperKali]

Closed with #87