Add verify workflow and specify node version

[HarlemSquirrel]

• Verify with linters and by building the browser extensions on each push.
• Add web-ext
• Specify the same node version we're using with the main app.

[Aetherinox]

Is this one ready to go or are you still adding?

I'd try to see if we can bump prettier to v3 since that's what KeeWeb is running on now, then the configs can be used across the board.

I made a really nice config for ESLint, but there are still plugins not compatible with the latest version, so I have to wait.

[HarlemSquirrel]

This is ready if it looks good to you

[HarlemSquirrel]

I can try bumping prettier

[Aetherinox]

Prettier v3 die on you?

[HarlemSquirrel]

Prettier v3 die on you?

Yeah, led me down dependency hell. Opened new PR to work on node 18 and hopefully prettier 3

[Aetherinox]

Trust me, already went through that with KeeWeb.

I lost a week of my life just fixing that mess.