Sign MacOS binaries

[mauromorales]

Is your feature request related to a problem? Please describe.

When trying to run on MacOS, you need to give the binary permision via Gatekeeper which can get annoying see: https://github.com/mudler/LocalAI/pull/2389

Describe the solution you'd like

You can sign the binaries so all that the user needs to do is to accept in a pop up when running for the first time, which is a lot more user friendly. See https://developer.apple.com/developer-id/

Describe alternatives you've considered

Keep allowing in Gatekeepr

Additional context