Add Safari support

[ionleu]

What's the bug?

No Safari support yet. We should port the extension so it works on Safari too.

How to reproduce

Try installing the extension on Safari—it’s not available.

What should happen?

The extension should run on Safari, same as Chrome/Firefox.

Screenshots

N/A

Your setup

• OS: macOS
• Browser: Safari
• Node: 18.19.1

Anything else?

Docs to help:

• https://evilmartians.com/chronicles/how-to-quickly-and-weightlessly-convert-chrome-extensions-to-safari
• https://bartsolutions.medium.com/how-to-convert-an-chrome-extension-into-a-safari-web-extension-and-upload-to-mac-app-store-69c0f7142178