feat: add QR hardware wallet error mappings for extension

[david0xd]

This PR adds QR hardware wallet error mappings (see change log and code changes).

Fixes: https://consensyssoftware.atlassian.net/browse/MUL-1446

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Note

Low Risk
Additive enum/mapping/test updates only; primary risk is downstream consumers needing to handle the new ErrorCode value.

Overview
Adds QR hardware wallet–specific error handling by introducing QR_WALLET_ERROR_MAPPINGS with camera-permission states for extension QR scanning (prompt dismissed vs. browser-blocked).

Extends ErrorCode with PermissionCameraPromptDismissed, adds corresponding unit tests, and documents the addition in the changelog.

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