Provide simple installation for macOS

[MattHag]

Information

• Solaar version: 1.1.14RC
• Distribution: macOS

Is your feature request related to a problem? Please describe.
The support for macOS seems good enough to be useful and tested and on a broader audience. However, the lack of a simple distribution and setup plays against it.

Describe the solution you'd like
Provide one of the following

• Brew installation brew install solaar
• Official macOS setup instructions
• Package with GUI installer

Additional context
With recently added Bluetooth support on macOS, the most important and useful features are finally also available on mac.

Related #1244

[vulpes2]

Two common options for packaging a python application into a macOS bundle are py2app and briefcase. py2app seems kind of abandoned at this point as it still requires the long-deprecated setup.py, and briefcase doesn't seem to have good documentation on how to integrate it with an existing project. I'll play with briefcase in the upcoming week and see how far I can get with it.

Notarization is going to be the bigger hurdle here, but there seems to be some generous people who are willing to help out open source developers with notarization if we can figure out the packaging stuff: https://blog.glyph.im/2023/03/py-mac-app-for-real.html