Provide a native Mac ARM (M#) build (or a universal build)

[gtritchie]

Is your feature request related to a problem? Please describe.
The current Mac download is Intel-only. It will run on an M1 Mac via Rosetta, but it is slower to start.

Describe the solution you'd like
Either provide a single universal build that runs natively on Intel and ARM Macs or provide two downloads (Intel and ARM).

Describe alternatives you've considered
I cloned and built the repo on my M1 Mac. That gave me an M1 build which starts up more quickly.

Additional context
None

[ferllings]

Thanks, I'll have a look at the github builder, to see if I can build on arm64.

Note for myself: https://docs.github.com/en/actions/hosting-your-own-runners/using-self-hosted-runners-in-a-workflow#using-default-labels-to-route-jobs

[ferllings]

Duplicate of #248