Feature Request: allow CameraX + ML Kit barcode-scanning deps for tools (or expose a configurable-format scanner)

[wildassoler]

The SDK already ships a full CameraX + ML Kit barcode pipeline internally
(sdk/ui/LightQrCodeScanner.kt), but it's hardcoded to FORMAT_QR_CODE and
those dependencies aren't on the tool allowlist, so third-party tools can't
build their own scanner even for a different barcode format.

Use case: I'm building a tool that scans product barcodes (EAN-13/UPC-A) to
look up nutrition data via a public API. There's no way to do this today
without either (a) the allowlist including:

• androidx.camera:camera-core / camera-camera2 / camera-lifecycle / camera-view / camera-mlkit-vision
• com.google.mlkit:barcode-scanning

or (b) an official LightBarcodeScanner composable (mirroring
LightQrCodeScanner) that accepts a configurable list of Barcode formats
instead of being locked to QR only.

Happy to help test either direction. Let me know which you'd prefer.

[dupontgu]

I think it should probably be both to some degree. I imagine folks are going to want to use camera for stuff other than scanning.

But I would say maybe start with (b) - we'd have to build out a wrapper for raw camera/mlkit stuff before making it available in tools I think.

[wildassoler]

Sounds good, makes sense to start with the wrapper - happy to test it
against a real product-barcode use case once it's ready.