Add a CI workflow to build binaries and add them on each new release.

[njourdane]

Improve the CI to publish binaries on each new release.

Targets:

• linux arm64
• linux x86_64
• macos arm64
• macos x86_64
• windows x86_64

The workflow is triggered only when a new release is published and add files to the release (see the test release on my fork, where the files are added by this run).

Notes:

• Each binary is packaged in tar.gz / zip in order to keep execution rights (ie. avoid a chmod u+x).
• PyInstaller is used to build the binaries, with UPX to reduce the file size (which is apparently activated only on windows).
• The workflow also includes a smoke-test to check if the binary is functional on each target platform.
• Minor code update had to be made to make the binaries work. In particular, the program version comes from the __version.py file, generated in the CI using the git tag. This behavior only happen in the binaries and doesn't affect the pip-installed programs.
• Installation instructions are not updated for now, I can add them if you are happy with this PR.