Sign official releases for smoother OSX experience

[i-make-robots]

Is your feature request related to a problem? Please describe. OSX programs should be signed so that they don't throw security warnings.

Describe the solution you'd like

• [ ] enroll in apple developer program: https://developer.apple.com/programs/
• [ ] get developer id: https://developer.apple.com/developer-id/
• [ ] change workflow to sign with jpackage
• [ ] test new system works and security is cool with new method

Describe alternatives you've considered Workaround is every OSX user has to do manual drudgery.

Additional context https://developer.apple.com/forums/thread/680257 https://github.com/Tools1000/packager1000