Task - Add Cross-Platform QR scanning support to repo

[michaeltchuang]

Task - Currently we use xzing on Android for our QR code scanning. It'd be great to find a cross-platform Android/iOS solution. I think QRKit (https://github.com/Chaintech-Network/QRKitComposeMultiplatform) might work well, but we're open to other suggestions. Add the new library dependencies into wallet-sdk common module and the app modules can then reference it.

For UI references, there is a button in the composeTestApp (on setting screen for Android/iOS) and Pera app module has a reference on home tab for QR scanning testing (Android only).

For composeTestApp - scan a QR code and pop open an alert with contents of uri/url

For Pera app module - scan a QR code and the existing deeplink flow should still work as expected