Fix scanning of small QR codes with JS

[MindFreeze]

Proposed change

Based on zwave-js/zwave-js-ui#3946 by @AlCalzone

https://github.com/nimiq/qr-scanner uses the native BarcodeDetector if available in browsers (essentially only Chrome), otherwise defaults to a JS port of ZXing. That port seems to be suboptimal, since it really struggles with the small Z-Wave QR codes.

https://www.npmjs.com/package/barcode-detector is a polyfill based on the WASM version of ZXing, which works much, much better.

The wasm file is added to static/js on build.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (thank you!)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example configuration

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue or discussion:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

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[AlCalzone]

I'll give this a shot later

[AlCalzone]

I can see that the wasm file gets loaded, but I'm not sure this is actually working better than before.

I'll try to make a comparison tomorrow with Z-Wave JS UI and the HA frontend.

[AlCalzone]

Ok, there seems to be no meaningful difference between Z-UI and HA anymore in terms of scanning, so that's good.

Only I'm getting this alert all the time, but I'm not sure why:

[MindFreeze]

Ok, there seems to be no meaningful difference between Z-UI and HA anymore in terms of scanning, so that's good.

Only I'm getting this alert all the time, but I'm not sure why

Turns out the wasm version gives a slightly different error msg. Fixed.

Also added a fix for the "add device" button. It was stuck on disabled after a canceled inclusion.

[MindFreeze]

Realized that originally the PR was not zwave specific and the zwave fix should have been in a separate PR. But they are related so pls don't make me separate it 🥺