MacOS support

[charleskimbac]

Remaking PR as the old one was mistakenly closed. Original PR: #64

Original message --
This commit is a pretty simple one, which adds support to MacOS Arm64. It was tested on macOS Tahoe, version 26.4.1, and worked flawlessly. There are changes in 3 files total:

• Add postcompile_mac_arm64.sh which builds a .pkg installer.
• Update package.json with a new compile:mac-arm64 command, which creates the final .pkg installer using the postcompile script.
• Update README.md to mention MacOS support.

See video in original PR.

[charleskimbac]

Pending final testing from macOS users. Run npm run compile:mac-arm64, run the installer, and if everything looks good, we can put the install in Releases. Thank you!

FYI @LielAmar @XFG16

[LielAmar]

Sorry for the delay, @charleskimbac.

I tested the installation process again on my mac (using the latest changes from this branch - macos-support). Everything seems to be working properly. I did, however, noticed the Chrome extension is still showing an "OS not supported" warning as you can see below. I think this is the only thing left before officially releasing MacOS support.

[charleskimbac]

@LielAmar Pushed some changes to fix that. Let me know if it all looks good now!

[LielAmar]

@charleskimbac I switched to a new MacBook and had a bit trouble getting the mac version to work properly. I have a few work-intensive days coming up, but I'll try to test everything thoroughly asap and update you. This would also be a good opportunity to ensure the new code for macos support works on another mac machine and not just my old M2 Air.

[charleskimbac]

@LielAmar Sounds good and of course, no rush. Thanks again!